APA vs MLA: Key Differences in Format, Citations, and When to Use Each

APA and MLA are two of the most common academic citation styles, but they are used for different subjects and format sources differently. APA is most often used in social sciences, psychology, education, nursing, business, and related fields. MLA is more common in humanities subjects such as literature, language, philosophy, arts, and cultural studies.

The main difference between APA and MLA is citation style. APA uses an author-date system, such as (Smith, 2024), while MLA uses an author-page system, such as (Smith 24). APA papers usually include a title page and a References page. MLA papers usually start with a four-line heading and end with a Works Cited page.

Choosing the correct research paper format helps you meet institutional requirements, avoid unnecessary revisions, and cite your sources correctly. Below, you will find a clear APA vs MLA comparison with examples, formatting rules, citation differences, and guidance on which style to use for your assignment.

Updated for APA 7 and MLA 9.

APA vs MLA: Quick Comparison

Feature	APA	MLA
Full name	American Psychological Association	Modern Language Association
Commonly used for	Psychology, education, nursing, sociology, business, and social sciences	Literature, language, philosophy, arts, cultural studies, and humanities
In-text citation style	Author-date: (Smith, 2024)	Author-page: (Smith 24)
Final source page	References	Works Cited
Title page	Usually required for student papers unless your instructor says otherwise	Usually not required unless your instructor asks for one
Page header	Page number for most student papers; running head for professional papers or when required	Student’s last name and page number
Source-title capitalization	Sentence case in many reference entries	Title case for most Works Cited entries
Best for	Research where source date matters	Textual analysis where page location matters

The easiest way to remember the difference is this: APA emphasizes when a source was published, while MLA emphasizes where a quoted or paraphrased idea appears in the source.

APA vs MLA: What Each Style Means

APA and MLA are citation and formatting systems that tell students how to structure a paper, cite sources in the text, and format the final list of sources. They both make academic writing more consistent, but they serve different disciplines and prioritize different source details.

• MLA stands for Modern Language Association. It is commonly used for humanities, literature, history, language studies, philosophy, arts, and cultural studies.
• APA stands for American Psychological Association. It is commonly used for social sciences, psychology, nursing, education, sociology, criminology, and business.

Both formatting styles support academic consistency and readability through specific rules for layout, citations, headings, source lists, and page design. The subject you are writing about, your professor’s instructions, and your institution’s requirements are the most important factors to consider when choosing between APA and MLA.

Although many students think about them in terms of MLA style vs APA style, they share several similarities. Both require in-text citations. Both include a list of sources at the end of the paper. Both use double spacing, readable fonts, and clear page organization. Still, the differences are important enough that using the wrong style can make your paper look unfinished or incorrectly formatted.

Should You Use APA or MLA?

Use the style required in your assignment instructions first. If your professor, department, or school gives a specific citation style, follow that requirement even if your subject could fit more than one format.

If you are allowed to choose, use this simple rule:

• Use APA for psychology, education, sociology, nursing, business, criminology, and other social science papers.
• Use MLA for literature, language, philosophy, arts, cultural studies, and other humanities papers.
• Use APA when the publication year is important to the argument, especially in research based on recent studies.
• Use MLA when page numbers, close reading, and textual evidence are central to the assignment.

If you are still unsure, ask your instructor before formatting the paper. It is easier to choose the correct style before writing than to reformat citations, headings, and the source page later.

APA vs MLA Format: Title Page, Header, Font, and Spacing

Once you know which formatting style you need to use, it is worth checking the main APA and MLA rules before you start writing. You can always choose to write my paper in APA format and skip the technical side, but understanding these basics will still help you stay in control of your work.

Formatting requirement	APA	MLA
Page size	Standard, 8.5 x 11 inches	Standard, 8.5 x 11 inches
Page margins	1 inch on all sides	1 inch on all sides
Page header	Page number, flush right, for most student papers; running head only if required or for professional papers	Last name + page number, flush right
Typeface	Any legible font, such as Arial, Calibri, Times New Roman, Georgia, or Lucida Sans Unicode	Legible font with a clear distinction between regular text and italics, commonly Times New Roman
Font size	Usually 10 pt to 12 pt, depending on the font	Usually 12 pt
Line spacing	Double	Double
Title page	Usually required for student papers unless your instructor says otherwise	Not required unless your instructor requests one
Final source page	References	Works Cited

When it comes to the aspects the formatting styles have in common, there are numerous ones to mention. However, as mentioned on the University of North Florida page, the discrepancies are even more significant.

MLA first-page format usually includes:

• Student name.
• Professor name.
• Class or course name.
• Date.
• Centered title on the first page.
• Last name and page number in the header.

APA student-paper format usually includes:

• Separate title page.
• Paper title.
• Author name.
• Institutional affiliation.
• Course name and number.
• Instructor name.
• Due date.
• Page number in the header.

The biggest formatting difference is the first page. APA student papers usually include a separate title page with the paper title, author name, institution, course, instructor, due date, and page number. MLA papers usually begin with a four-line heading on the first page, followed by the centered paper title.

Need help checking APA or MLA formatting? Our academic editors can review your title page, headings, in-text citations, References or Works Cited page, and overall paper formatting before submission.

APA vs MLA In-Text Citations: Author-Date vs Author-Page

In-text citations are the easiest way to tell APA and MLA apart. MLA uses the author’s last name and page number because humanities papers often analyze specific passages. APA uses the author’s last name and publication year because social science papers often depend on the recency of research. For direct quotes in APA, add the page number as well.

You can find the most common MLA and APA citation differences in the table below. You can also review our detailed guide on how to cite a research paper in MLA if your assignment requires MLA formatting.

Citation requirement	APA	MLA
Basic method	Author-date	Author-page
Basic parenthetical citation	(Jones, 2003)	(Jones 122)
Author’s last name in the sentence	According to Jones (2003), the results were significant.	According to Jones, the results were significant (122).
Author’s last name in parentheses	The results were significant (Jones, 2003).	The results were significant (Jones 122).
Two authors	(Jones & Brown, 2003)	(Jones and Brown 122)
Authors with the same last name	(A. Jones, 2003) and (B. Jones, 2004)	(A. Jones 122) and (B. Jones 206)
Three or more authors	(Jones et al., 2003)	(Jones et al. 122)
Direct quote	(Jones, 2003, p. 122)	(Jones 122)

APA and MLA both allow citations inside parentheses or integrated into sentences. The key difference is what each style emphasizes. APA prioritizes the author and publication year. MLA prioritizes the author and page number.

APA vs MLA Citation Examples

The format difference becomes clearer when you compare the same source in both styles. Below are simple examples for a book, journal article, and website.

Book Citation Example

APA:

Smith, J. (2024). Academic writing basics. College Press.

MLA:

Smith, John. Academic Writing Basics. College Press, 2024.

Journal Article Citation Example

APA:

Brown, L. (2023). Student citation habits in first-year writing. Journal of Academic Writing, 15(2), 44–59. https://doi.org/10.0000/example

MLA:

Brown, Lisa. “Student Citation Habits in First-Year Writing.” Journal of Academic Writing, vol. 15, no. 2, 2023, pp. 44–59. https://doi.org/10.0000/example.

Website Citation Example

APA:

Modern Language Association. (2024). Using MLA format. https://style.mla.org

MLA:

Modern Language Association. “Using MLA Format.” MLA Style Center, 2024, https://style.mla.org.

APA usually places the year near the beginning of the reference. MLA usually places the year later and gives more attention to containers, such as journals, websites, databases, or edited collections.

APA vs MLA Similarities and Differences

Analyzing MLA and APA formatting styles, students can notice both similarities and differences. Take your time to review the rules before you write so that you can follow one style consistently without accidentally combining them.

Similarities:

• Both allow citations inside parentheses or integrated into sentences.
• Both shorten citations for three or more authors with “et al.”
• Both require readable fonts.
• Both use double spacing.
• Both require clear and consistent formatting for titles.
• Both include a list of sources used in the paper.
• Both require accurate source information to help readers locate the original material.

Differences:

• APA uses commas in parenthetical citations. Example: (Smith, 2020, p. 15).
• MLA does not use commas between the author and page number. Example: (Smith 15).
• APA focuses on the timeliness of research.
• MLA focuses more on authorship, text, and location within the source.
• APA often includes DOIs and URLs for online resources when available.
• MLA usually includes URLs without the initial http:// or https:// when possible.
• APA uses “References” for the final source page.
• MLA uses “Works Cited” for the final source page.
• APA is commonly used for social sciences.
• MLA is commonly used for humanities papers.

Other APA vs MLA Differences: Abstracts, Headings, Tables, Figures, and Block Quotes

Although we have covered the major MLA and APA formatting rules for citations, there are still several other formatting details to consider. Instead of reviewing each format separately, the table below compares the main content-formatting requirements side by side.

Formatting requirement	APA	MLA
Abstract	An abstract may be required for professional papers, research reports, or specific class assignments. In many student papers, an abstract is not required unless the instructor asks for one. If included, it appears on a new page titled “Abstract” and usually summarizes the paper in up to 250 words.	An abstract is usually not required in MLA papers unless requested by the instructor. If included, it normally appears at the beginning of the paper.
Headings	APA has five possible heading levels. Level 1: Centered, bold, title case heading. The text starts a new paragraph. Level 2: Flush left, bold, title case heading. The text starts a new paragraph. Level 3: Flush left, bold italic, title case heading. The text starts a new paragraph. Level 4: Indented, bold, title case heading ending with a period. The text continues on the same line. Level 5: Indented, bold italic, title case heading ending with a period. The text continues on the same line.	MLA allows headings if they help organize the paper. Headings should be consistent throughout the paper and may be numbered or unnumbered, depending on assignment requirements.
Block quotes	Use block format for quotes of 40 words or more. Start the quote on a new line, indent it 0.5 inches from the left margin, and include the citation after the closing punctuation.	Use block format for quotes of more than four lines of prose or three lines of verse. Start the quote on a new line, indent it 0.5 inches from the left margin, and include the citation after the closing punctuation.
Footnotes	Footnotes may appear at the bottom of the page or on a separate page before the References section.	Footnotes may appear at the bottom of the page or on a separate page before the Works Cited section.
Tables	The table number appears above the table in bold. The table title appears below it in italics. APA tables usually use only horizontal lines needed for clarity and avoid vertical borders.	The table number and table title or caption usually appear above the table. Formatting should be clear, consistent, and aligned with instructor requirements.
Figures	The figure number appears in bold, and the figure title appears in italics. APA figure titles are usually placed above the figure, with notes below the figure if needed.	The figure caption usually appears below the figure and starts with “Fig.” followed by the figure number, title, and source information if applicable.
Lists	Numbered lists are used for items in a specific order. Bulleted lists are used for items without chronology or hierarchy.	Lists may be numbered or bulleted when they improve readability. Formatting should remain consistent across the paper.
Final source page	A separate section titled “References” is used.	A separate section titled “Works Cited” is used.

It is usually easy to identify the formatting style by looking at the first page, in-text citations, and final source page. APA papers are more likely to include a separate title page, author-date citations, and a References page. MLA papers are more likely to use a first-page heading, author-page citations, and a Works Cited page.

At the same time, some requirements are similar. Both APA and MLA use readable fonts, double spacing, one-inch margins, and source lists. Both also require students to cite borrowed ideas, not only direct quotations.

Common APA vs MLA Mistakes to Avoid

Before submitting your paper, check for these common mistakes:

1. Mixing citation styles. Do not use APA in-text citations with an MLA Works Cited page, or MLA in-text citations with an APA References page.
2. Using the wrong final source-page title. APA uses “References.” MLA uses “Works Cited.”
3. Forgetting the year in APA citations. APA in-text citations usually need the author and year.
4. Adding commas to MLA citations. MLA parenthetical citations usually look like this: (Smith 24), not (Smith, 24).
5. Formatting the first page incorrectly. APA usually uses a title page. MLA usually uses a heading on the first page.
6. Using a running head in every APA student paper. Most APA student papers need a page number, not a running head, unless the instructor requests one.
7. Ignoring instructor requirements. Your professor’s instructions override general style rules.

Helpful APA and MLA Resources

If you need to double-check official formatting rules, use trusted academic style resources. The APA Style website provides guidance for APA 7, including student-paper formatting, references, and in-text citations. The MLA Style Center provides official MLA 9 guidance, including Works Cited examples, formatting rules, and citation templates. You can also use academic writing resources such as Purdue OWL to compare citation and formatting examples before submission.

Of course, the complete APA and MLA handbooks contain more detailed rules than one blog post can cover. If your assignment has unusual sources, discipline-specific requirements, or strict instructor notes, always follow the assignment guidelines first.

Need help checking APA or MLA formatting? Our academic editors can review your title page, headings, in-text citations, References or Works Cited page, and overall paper formatting before submission.

APA vs MLA: Final Takeaway

APA and MLA are not competing styles; they are built for different academic contexts. APA is usually the better fit for social sciences and research-focused papers because it highlights publication dates. MLA is usually the better fit for humanities papers because it highlights authors, texts, and page locations.

Before you start formatting, check your assignment instructions. If no style is specified, choose the format that best matches your subject and evidence. Use APA for research where recent studies matter. Use MLA for essays built around close reading, quotations, and textual analysis.

If formatting is a chore you wish to avoid, there are two practical options. First, you can use automatic citation generators and carefully check the results for errors. Second, you can get professional formatting help from a reputable academic writing service like Write My Paper for Me. Many students use expert support to handle formatting requirements while they focus on research, argument development, and final revisions.

If you prefer to tackle formatting on your own, bookmark this guide and come back whenever you need a quick APA vs MLA comparison. You can also review our detailed guides on Harvard style citation and Chicago style if your assignment requires a different format.