
How to Cite a PDF in APA, MLA and Chicago
A PDF is a file format, not a source type. Learn how to identify what your PDF really is, then cite it correctly in APA 7, MLA 9 and Chicago with examples.
让写作更清晰、负责任地使用 AI、写出能收到回复的邮件——实用指南都在这里。

A PDF is a file format, not a source type. Learn how to identify what your PDF really is, then cite it correctly in APA 7, MLA 9 and Chicago with examples.

How to cite and quote poems in MLA 9, APA 7 and Chicago: works-cited entries, line numbers, slashes for line breaks, block quotes and poems found online.

Reference formats and in-text citations for PowerPoint slides in APA 7, MLA 9 and Chicago, including course slides, public slide decks and conference talks.

Cite a YouTube video correctly in APA 7, MLA 9 and Chicago: who counts as the author, how to format the title and date, and how to add timestamps in-text.

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When a source has no author, cite it by title. See APA 7th and MLA 9th in-text examples for web pages, articles, reports and group authors.

How to write and insert footnotes: Chicago full and shortened notes, numbering and placement rules, ibid., and steps for Word and Google Docs.

How to end an email well: a clear closing line, the right sign-off, a clean signature, and examples for formal, work, academic and casual emails.

Fix unattributed AI-assisted text the right way: rewrite it in your own words, add real sources, and disclose AI use where your rules require it.

Where the page number goes in APA 7th and MLA 9th citations, how to cite page ranges, and what to use when a source has no pages at all.

Short on words? Add evidence, examples, counterarguments and analysis that make your essay stronger, not longer for its own sake. Practical steps inside.