MLA (Modern Language Association) 9th edition is the standard format for research papers in literature, languages, humanities, and cultural studies. MLA formatting emphasizes simplicity compared to APA — it uses fewer headings, simpler citations, and straightforward page setup. However, MLA rules are still detailed, and many students lose points on formatting because they mix MLA with APA conventions or use outdated MLA 8th edition rules. This guide covers MLA 9th edition requirements for research papers, common mistakes, and proper formatting from start to finish.
MLA 9th edition overview
MLA (Modern Language Association) format specifies how humanities research papers should be structured. Key elements:
- Page setup: 1-inch margins all sides, 12-point readable font, double-spaced
- In-text citations: (Author Page) format — author's last name and page number in parentheses
- Works Cited: Alphabetical list of all sources at the end, with hanging indents
- Header: Simple — just your last name and page number, top right
- No title page: Start with your name, professor, course, date (top left) on page 1, then title centered below
- Headings: Simple centered headings (no multiple levels like APA)
MLA 9th edition (current) differs from earlier versions in URL and container formatting, so ensure your professor wants 9th edition.
Page setup and formatting
Margins and spacing
- Margins: 1 inch on all sides (top, bottom, left, right)
- Line spacing: Double-spaced throughout
- Font: 12-point readable font (Times New Roman, Calibri, Arial preferred)
- Paragraph indentation: First line of each paragraph indented 0.5 inches
- Alignment: Left-aligned
Header
- Top right corner: Your last name followed by a space and the page number (e.g., "Smith 1")
- First page: Include a header block (not indented):
Your Name
Professor Name
Course Name
Date (Day Month Year, e.g., "15 April 2024") - Centered title: Below the header block, center your paper's title
In-text citations: MLA format
MLA uses author-page citations embedded in parentheses:
Basic format
- One author: (Smith 45) — last name and page number, no comma
- Two authors: (Smith and Johnson 45)
- Three or more authors: (Smith et al. 45)
- No author: Use shortened title: ("Climate Change" 45)
- No page number: (Smith) — some sources like websites don't have page numbers
- Multiple works by same author: (Smith, "Article Title" 45) — include shortened title to distinguish
Placement rules
- At end of sentence: (Smith 45). — citation before period
- Block quote: The citation goes after the period: [Block quote text ends.] (Smith 45).
- Paraphrasing: Cite even when you don't quote. "Smith argues that [paraphrased idea] (Smith 45)."
Works Cited: MLA format
The Works Cited page appears on a new page at the end of your paper. It includes all sources cited in the text.
Basic format (book example)
Author(s). Title of Book. Publisher, Publication Year. URL or DOI.
Example: Smith, John, and Karen Johnson. The Effects of Climate Policy. Oxford University Press, 2022, https://doi.org/10.1234/book.2022.5678.
Key rules
- Alphabetical order: By author's last name
- Hanging indent: First line flush left, subsequent lines indented 0.5 inches
- Italicized titles: Major works (books, journals) are italicized
- "Quoted" titles: Article titles in quotation marks, not italicized
- URL or DOI: Include at the end without "https://" — just the URL or DOI
- Access date: For websites (MLA 9) — access date sometimes required; check assignment
Common source types in MLA format
| Source type | Format |
|---|---|
| Book | Author(s). Title. Publisher, Year. URL. |
| Journal article | Author(s). "Article Title." Journal Name, vol. #, no. #, Year, pp. page range. DOI. |
| Website | Author or Organization. "Page Title." Site Name, Publisher, Date, URL. |
| Edited book chapter | Author. "Chapter Title." Book Title, edited by Editor, Publisher, Year, pp. page range. |
MLA headings
MLA is simpler than APA on headings. Typically:
- Centered, title case: Main section headings centered and in title case
- No bold or italics required: Unlike APA, MLA doesn't use bold for headings (though some professors allow it)
- Minimal levels: Most papers use just one level of heading or none at all
Common MLA formatting errors
- Mixing APA and MLA: Using (Author, Year) APA format instead of (Author Page) MLA format — most common mistake
- Wrong title formatting: Forgetting to italicize book titles or putting quotation marks around them (reverse the conventions)
- Forgetting page numbers on in-text citations: MLA requires page numbers (unlike APA which only requires them for quotes)
- Missing hanging indent on Works Cited: Forgetting to indent subsequent lines
- Wrong date format: Using "2024" instead of "15 April 2024"
- Including "Works Cited" entry for personal communication: Interviews and personal emails are cited in-text only, not in Works Cited
- Using outdated MLA 8 rules: MLA 9 changed how URLs and containers are formatted — make sure you're current
MLA 8 vs. MLA 9: Key changes
MLA 9th edition (2021) differs from MLA 8th in important ways:
- Container format: MLA 9 emphasizes "container" (journal, anthology, website) — format changed significantly
- URLs: MLA 9 requires the full URL (not just the domain)
- Titles: Guidelines on when to italicize vs. quote refined
- DOI: MLA 9 prefers DOI over URL when available
Quick MLA formatting checklist
- ☐ 1-inch margins all sides
- ☐ Double-spaced throughout
- ☐ 12-point readable font (Times New Roman)
- ☐ Header: last name + page number (top right)
- ☐ First page: name, professor, course, date (top left)
- ☐ Title centered below header block
- ☐ In-text citations: (Author Page) format
- ☐ Works Cited page on new page
- ☐ Works Cited entries alphabetized
- ☐ Hanging indents on Works Cited
- ☐ Book titles italicized, article titles in quotes
- ☐ Every in-text citation has a Works Cited entry
Get MLA formatting help
Whether you need citation correction, Works Cited formatting, or a full MLA format review, we ensure your paper meets MLA 9th standards.
Order MLA helpFAQ
Use MLA 9 (current edition, published 2021) unless your professor specifies otherwise. MLA 9 changed container formatting and URL requirements, so using 8th will cost points.
Works Cited should start on a new page at the end of your paper. It's not on the same page as your conclusion.
Depends on assignment. A general rule: at least one source per page. A 10-page paper should have 10+ Works Cited entries. Check your assignment for a specific requirement.