How to Write an Appendix in APA, MLA, and Chicago Format

What Is an Appendix in a Paper?

An appendix is a section at the end of a paper that holds supporting material (data, instruments, transcripts, or detailed explanations) that would interrupt the main text if it were included there instead.

It gives you a place to include details, examples, technical information, supplementary evidence, or lengthy documentation that would disrupt the main text's flow without forcing the reader to wade through it mid-argument.

Why Include an Appendix in a Paper?

An appendix lets you support your argument with material that's too detailed, too long, or too technical to sit inside the body text. An appendix isn't the same as condensing your paper down to its key points; if you need to do that instead, see our guide on how to write a summary.

Specific uses include:

• Providing additional details or examples: Appendices allow the inclusion of extensive information, raw data, questionnaires, or calculations that support the main content.
• Including technical information: Detailed explanations, schematics, or flowcharts can be placed in appendices to cater to readers interested in technical aspects.
• Presenting supplementary evidence or analysis: Appendices enable the inclusion of additional graphs, charts, or tables that expand upon main body data, reinforcing arguments.
• Including lengthy information or documentation: Appendices are suitable for housing extensive documentation, such as legal agreements or survey results, without interrupting the main text's flow.
• Enhancing clarity and comprehensibility: Appendices improve overall clarity by providing background information, key term definitions, or research methodology details.

Appendix vs. Footnotes: What's the Difference?

An appendix holds extended, optional supporting material at the end of a document, while a footnote gives a brief note tied to a specific point in the text. Here's how the two compare:

Appendices:

• Placed at the end of a document, following the main text and any references or bibliographies.
• Contain supplementary and detailed information that supports or expands upon the main text.
• Generally longer and can span multiple pages, accommodating detailed content.
• Typically numbered or lettered (e.g., Appendix A, Appendix 1) for easy reference within the document.
• Provide in-depth information that isn't crucial for understanding the main text but offers additional insights or evidence.

Footnotes/Endnotes:

• Appear at the bottom of the page or at the end of a section or the entire document, with the reference indicated within the main text.
• Typically include brief explanations, comments, or references related to specific points.
• Generally short, often just a sentence or two.
• Numbered consecutively throughout the document (footnotes) or separately per section (endnotes).
• Provide concise additional information, citations, or commentary that enhances the reader's understanding.

What Goes in an Appendix?

An appendix can hold almost any supporting material that's too long, too detailed, or too visual to sit in the main text. Common examples include:

• Tables and charts
• Figures and graphs
• Maps
• Images
• Audio or video clips
• Detailed textual descriptions
• Spreadsheets
• Lists too long for the main text
• Scanned documents
• Raw statistical data
• Original math and calculations

If your appendix needs to follow different formatting rules than the rest of your essay type, our essay writing services for every type can match the exact citation style your assignment requires.

How Do You Format an Appendix in APA, MLA, and Chicago Style?

Appendices go after your reference list, labeled with letters, and formatted by citation style: APA centers bold labels, Chicago uses Times New Roman font, and MLA places appendices before references. Each style has its own rules for labeling, placement, and page setup, with a few key differences covered style by style below.

How Do You Label an Appendix?

• If there's only one appendix, label it simply "Appendix"; don't add a letter.
• If there are multiple appendices, use alphabetical labels (e.g., Appendix A, Appendix B), and refer to each one by its label in the main text (for example, "see Appendix B").
• Write the label and the title on separate lines, both centered and bold: label first, title second, title in title case.

How Do You Format the Appendix Page?

• Begin each new appendix on a separate page.
• Center and bold the label at the top of the page; center and bold the title on the line below it.
• Maintain the running head if used in the rest of the paper, and keep page numbers in the top right corner of every page, including appendix pages.
• Format body text the same way you've formatted the rest of the paper, using indented paragraphs after the first.
• If an appendix consists of nothing but a single table or figure, the appendix label replaces the table/figure numbering entirely: refer to it as "Appendix B," not "Table B1."
• For multiple tables, figures, or equations within one appendix, label them with the appendix letter plus a number (e.g., Table B2 is the second table in Appendix B).

Where Do Appendices Go in a Paper?

As per the APA Publication Manual (7th Edition), appendices go after the reference list, serving as the final section of the paper. Some exceptions exist when citations appear inside the appendix itself, so check with your instructor or editor if that applies to you.

How Do You Write an Appendix Step by Step?

Building an appendix comes down to six steps: pick the content, organize and label it, format it consistently, place it in order, cite anything that needs it, and proofread before you submit.

1. Determine the content. Identify the type of information you want to include: raw data, charts, graphs, images, survey questionnaires, interview transcripts, or any supporting material that strengthens your research.
2. Organize and label. Create a clear, logical structure. If you have multiple appendices, label them with letters (Appendix A, Appendix B) and give each one a descriptive, informative title.
   
   

3. Format consistently. Use the same font and font size as the rest of your paper. Make sure any tables, figures, or other visuals are properly formatted and labeled with clear titles and captions.
4. Place in sequential order. Insert the appendix after the reference list or bibliography, in the order the appendices are referenced in your main text. Start each one on a new page.
5. Provide references and citations. If you cite specific appendices in the body of your paper, mention their labels so readers can find the relevant content, and make sure anything cited inside an appendix also appears in your main reference list.
6. Proofread and revise. Before finalizing, review the appendix for errors, inconsistencies, or missing information, and confirm the content adds value to your research.

How Do You Format an Appendix in APA?

In APA style, label the appendix "Appendix" (or "Appendix A," "Appendix B," etc. for multiple), center and bold the label and title on separate lines, and place it after the reference list with full page numbering. The key rules:

• Begin with the heading "Appendix" followed by a letter if there's more than one (e.g., Appendix A, Appendix B).
• Place the heading at the top of the appendix, above the title.
• Maintain the order of information as it's referenced in the paper.
• Include the appendix after the reference list.
• Provide page numbers for every appendix page.
• Give each appendix its own page, regardless of length.
• Include footnotes when necessary.

Here's an example:

How Do You Format an Appendix in Chicago Style?

Chicago style follows the same core structure as APA (label, title, page numbers), with a few format-specific differences: Times New Roman at 12-point, page numbers in the top right (not on the front cover), and the bibliography placed as its own final page, separate from the appendices. Key rules:

• Use "appendixes" (or "appendices") as the plural; there's no special Chicago-specific term for it.
• Set body text in Times New Roman, 12-point.
• Number pages in the top right corner; skip numbering on the front cover.
• Place the bibliography as the final page of the document, separate from the appendices.
• Footnotes can appear within the appendix itself when they support that section's content.

Here's an example:

How Do You Format an Appendix in MLA?

MLA's appendix rules closely mirror APA's, with one key difference: in MLA, the appendix comes before the list of works cited, not after. The rest of the structure stays the same:

• Place the appendix before the list of references.
• Use letters (Appendix A, Appendix B) to label multiple appendices.
• Maintain the order of information as it's presented in the paper.
• Provide page numbers for every appendix page.
• Give each appendix its own page, regardless of length.

Here's an example:

You've got the formatting rules down. The next step is making sure the rest of your paper holds up to the same standard. CollegeEssay.org covers every essay type, keeping citations and structure consistent from intro to appendix so nothing gets flagged in review.

What Should You Check Before Submitting Your Appendix?

Before you submit, run through this checklist to catch the mistakes that get appendices flagged most often:

• Confirm every appendix is referenced at least once in the main text (for example, "see Appendix B").
• Check that the label and title sit on separate centered, bold lines, in the order your required style specifies.
• Make sure page numbers continue correctly through every appendix page.
• Verify any source cited inside an appendix also appears in your main reference list, not in a separate one.
• Confirm each appendix starts on its own page, and that multiple appendices are labeled in the order they're first mentioned in the text.

Based on CollegeEssay.org's review of thousands of student submissions, the most flagged mistake is placing appendices before the reference list in APA format, which reverses the placement rule.

How Many Appendices Can a Paper Have?

There's no fixed limit on the number of appendices a paper can include, but each one should cover a single, distinct topic or data set rather than mixing unrelated material together. If you have a survey instrument, raw statistical output, and interview transcripts, that's three appendices, not one combined dump. Label them in the order you first reference them in the text (Appendix A, then Appendix B, and so on), and if you somehow need more than 26, restart the alphabet with AA, BB, and so forth.

In Conclusion

Many students struggle with appendix formatting until they realize the main rule is simple: put supplementary material at the end after references, label each one clearly, and follow whatever style guide the professor assigned. 

A correctly formatted appendix signals to your reader, and your grader, that you've handled the supporting material with the same care as the argument itself. Get the label, the placement, and the page setup right for your required style, and the rest of the paper carries that same credibility through to the last page.

You now know how to format an appendix in APA, MLA, or Chicago style. If the rest of your paper still needs work, whether that's structure, citations, or the writing itself, our professional writing service for every essay type can take it from here.