MLA vs Chicago: Key Differences Explained

Crafting a well-researched academic paper involves more than just presenting compelling arguments and evidence; it also requires meticulously documenting your sources. Citation styles provide a standardized framework for giving credit to original authors and guiding readers to your research materials. Among the most widely used styles in the humanities are MLA (Modern Language Association) and Chicago (The Chicago Manual of Style).

While both serve the same fundamental purpose – preventing plagiarism and facilitating source verification – they have distinct approaches to formatting, in-text citations, and bibliographies. Understanding these differences is crucial for students and professionals to ensure their work adheres to academic standards and meets specific disciplinary expectations.

This guide will systematically break down the key distinctions between MLA and Chicago styles, offering practical examples and helping you determine which style is appropriate for your work.

Core Differences at a Glance

Before diving into the specifics, here's a quick overview of the primary distinctions between MLA and Chicago:

| Feature | MLA Style | Chicago Style (Notes-Bibliography) | Chicago Style (Author-Date) | | :------------------------ | :------------------------------------------ | :----------------------------------------- | :----------------------------------- | | Primary Disciplines | Humanities (English, Literature, Languages) | History, Arts, some Social Sciences | Social Sciences, Natural Sciences | | In-text Citation | Parenthetical (Author-Page) | Footnotes/Endnotes | Parenthetical (Author Year, Page) | | Reference List Name | Works Cited | Bibliography | Reference List | | Key Formatting Element| In-text author-page number | Numbered notes, full bibliography | In-text author-date, reference list | | Title Page | Optional (usually title block on first page)| Optional (separate page common) | Optional (separate page common) | | Running Head | Last Name and Page Number | Page Number (sometimes with shortened title)| Page Number (sometimes with shortened title)|

Understanding MLA Style

MLA style is predominantly used in the humanities, especially in fields like English language and literature, foreign languages and literatures, literary criticism, and other related disciplines. It emphasizes author names and page numbers in its in-text citations, making it easy for readers to locate the specific passage in the "Works Cited" list.

In-text Citations: Parenthetical References

MLA uses parenthetical citations within the text to briefly point readers to the full source information on the "Works Cited" page. The basic format includes the author's last name and the page number where the information was found.

• Basic Format: (Author's Last Name Page Number)

* Example: "The quick brown fox jumps over the lazy dog" (Smith 23).

• No Author: If the author is unknown, use a shortened title of the source (usually the first few words of the title) in quotation marks, followed by the page number.

* Example: ("Quick Brown Fox" 5).

• Author Mentioned in Text: If you mention the author's name in your sentence, only the page number is needed in parentheses.

* Example: According to Smith, "The quick brown fox jumps over the lazy dog" (23).

• Multiple Works by the Same Author: If citing multiple works by the same author, include a shortened title along with the author's last name and page number.

Example: (Smith, Fox Tales* 23).

Works Cited Page

The "Works Cited" page is an alphabetized list of all sources directly referenced in your paper. It appears at the end of your document on a new page.

• Formatting:

Titled "Works Cited" centered at the top of the page. Double-spaced throughout. Each entry uses a hanging indent (the first line is flush with the left margin, and subsequent lines are indented 0.5 inches). Entries are alphabetized by the author's last name (or by title if no author is given).

• Core Elements (MLA 9th Edition):

1. Author. 2. Title of source. 3. Title of container, 4. Other contributors, 5. Version, 6. Number, 7. Publisher, 8. Publication date, 9. Location.

Each element is followed by a period unless it's followed by a comma, indicating it's part of a larger container.

• Examples:

Book: Doe, Jane. The Art of Writing. Penguin Press, 2020. Journal Article: Smith, John. "The Impact of Digitalization on Literature." Journal of Modern Studies, vol. 45, no. 2, 2021, pp. 112-130. Website: Johnson, Emily. "Citation Best Practices." Academic Hub*, 15 Mar. 2023, www.academichub.org/citation-best-practices. Accessed 10 Apr. 2023.

General Formatting

• Margins: 1-inch on all sides.
• Spacing: Double-spaced throughout the entire paper, including the "Works Cited" page.
• Font: A readable font, typically Times New Roman 12pt.
• Page Numbers: A running header with your last name and the page number in the upper right-hand corner (e.g., Smith 1).
• Title Block: On the first page, include your name, instructor's name, course name, and date, each on a separate double-spaced line, flush left. The paper's title is then centered below this block.

Understanding Chicago Style

The Chicago Manual of Style (CMOS) is widely used in history, arts, and some social sciences. It offers two main documentation systems:

1. Notes-Bibliography (NB) System: Preferred for humanities (literature, history, arts). It uses footnotes or endnotes for citations and a "Bibliography" at the end.
2. Author-Date (AD) System: Preferred for social, physical, and natural sciences. It uses parenthetical citations within the text and a "Reference List" at the end, similar to APA style.

While both are "Chicago," they are quite different. We'll focus primarily on the more complex Notes-Bibliography system, with a brief mention of Author-Date.

Notes-Bibliography (NB) System

This system uses numbered footnotes or endnotes to cite sources within the text. Each note corresponds to a superscript number in the body of the paper.

Footnotes/Endnotes

• Placement: A superscript number is placed at the end of the sentence or clause containing the cited information, after any punctuation (except for a dash).
• First Reference: The first time you cite a source, the note contains a full citation, including all publication details.

Example: 1. Michael Pollan, The Omnivore’s Dilemma: A Natural History of Four Meals* (New York: Penguin Press, 2006), 99–100.

• Subsequent References: For subsequent citations of the same source, a shortened form is used, typically just the author's last name, a shortened title, and the page number.

Example: 2. Pollan, Omnivore’s Dilemma*, 3.

• Ibid.: If a source is cited immediately after a previous note for the exact same page number, "Ibid." can be used. If it's the same source but a different page, "Ibid." followed by the new page number is used.

Example: 3. Pollan, Omnivore’s Dilemma, 5. 4. Ibid., 8. (Refers to Pollan, Omnivore’s Dilemma*, page 8)

Bibliography

The "Bibliography" lists all sources cited in the paper, plus sometimes additional sources consulted but not directly cited. It appears at the end of the document on a new page.

• Formatting:

Titled "Bibliography" centered at the top of the page. Double-spaced throughout. Each entry uses a hanging indent. Entries are alphabetized by the author's last name. * Unlike notes, bibliography entries typically list the author's last name first.

• Examples:

Book: Pollan, Michael. The Omnivore’s Dilemma: A Natural History of Four Meals. New York: Penguin Press, 2006. Journal Article: Kelley, Robert. "The Ghost of Hamlet's Father: A Freudian Interpretation." Shakespeare Quarterly 58, no. 3 (2007): 289-305. Website: Davidson, Sarah. "The History of Typography." Type & Design Blog*, May 12, 2022. https://www.typeanddesign.org/history-typography. Accessed April 10, 2023.

Author-Date (AD) System

The Author-Date system is more concise and commonly found in the sciences.

In-text Citations

• Format: (Author Year, page number)

Example: (Jones 2018, 45) If the author is mentioned in the text: Jones (2018, 45) argues...

Reference List

Instead of a "Bibliography," this system uses a "Reference List" formatted similarly to an MLA Works Cited page or a Chicago NB Bibliography, but with the publication year placed immediately after the author's name.

• Example (Book):

Jones, Alex. 2018. The Science of Learning. Boston: University Press.

General Formatting

• Margins: 1-inch on all sides.
• Spacing: Double-spaced for the main text. Block quotations are single-spaced. Footnotes/endnotes are typically single-spaced within themselves but double-spaced between entries.
• Font: A readable font, typically Times New Roman 12pt.
• Page Numbers: Usually placed in the upper right-hand corner.
• Title Page: A separate title page is common, including the title, author's name, and course information, all centered and double-spaced.

When to Use Which Style

Choosing between MLA and Chicago largely depends on your academic discipline and, most importantly, your instructor's specific requirements.

• Use MLA if:

You are writing for an English, literature, foreign language, or other humanities course. Your instructor explicitly requests MLA style. * Your primary focus is on textual analysis and interpretation, where direct quotes are frequently used.

• Use Chicago (Notes-Bibliography) if:

You are writing for a history, art history, classical studies, or divinity course. Your instructor explicitly requests Chicago NB style. * Your paper involves extensive historical research or numerous sources that might benefit from detailed footnotes for additional commentary without interrupting the main text.

• Use Chicago (Author-Date) if:

You are writing for a social science (e.g., sociology, political science), natural science, or physical science course. Your instructor explicitly requests Chicago AD style. * The emphasis is on the recency of research and quick identification of authors and publication dates, similar to APA style.

Always check your assignment prompt or syllabus first! If no style is specified, consult your department's guidelines or ask your instructor for clarification. Consistency is key, regardless of the style you choose.

Key Takeaways

While MLA and Chicago both aim to standardize academic referencing, their distinct approaches mean they are not interchangeable. MLA's parenthetical author-page citations and "Works Cited" page are favored in language and literature studies, while Chicago's dual systems (Notes-Bibliography and Author-Date) cater to the detailed source documentation needs of history and the sciences, respectively.

Mastering these styles is a fundamental skill for any student or researcher. It demonstrates academic rigor and respect for intellectual property. If the intricacies of citation styles still feel overwhelming, remember that platforms like Humanize offer professional writing and editing services to ensure your papers are perfectly formatted and referenced, leaving you free to focus on your content. By understanding their differences, you can confidently choose and apply the correct style, enhancing the credibility and clarity of your academic work.