A PDF is a file format, not a type of source, so you cite whatever the PDF actually contains: a journal article, a report, a book, a fact sheet or a set of course notes. Find the author, date, title and publisher inside the document, then use the citation format for that source type and add the URL or DOI where you found it. In most cases you don't need to write "PDF" in the citation at all.
Examples below use fictional authors and organizations.
Step 1: Figure out what kind of source your PDF is
Open the PDF and look at the first page, the header or footer, and the last page. You're looking for clues:
| What you see | It's probably a... |
|---|---|
| Journal name, volume, issue, page range, DOI | Journal article |
| Organization logo, report number, "prepared by" | Report (often called gray literature) |
| ISBN, publisher, chapter headings | Book or book chapter |
| Course code, lecturer name | Lecture notes or course materials |
| Short guidance from an agency, no report number | Fact sheet or web document |
| "Thesis submitted in partial fulfillment..." | Thesis or dissertation |
Once you know the type, you can use the matching format below.
Step 2: Find the citation details inside the document
For most sources you'll need:
- Author: a person or an organization.
- Date: publication year (and month/day for some sources).
- Title: of the document, and of the journal or larger work if relevant.
- Publisher: often the organization that released it.
- Identifier: DOI, URL or report number.
- Page numbers for quotations, using the numbers printed on the pages.
APA 7th edition
Report from an organization
Organization. (Year). Title of report (Report No. if available). Publisher (if different from author). URL
Coastal Water Research Institute. (2024). Microplastics in estuary sediments: Regional survey results (Report No. CWRI-24-07). https://www.cwri.example.org/reports/microplastics-2024.pdf
In-text: (Coastal Water Research Institute, 2024, p. 18)
When the author and the publisher are the same organization, you leave the publisher out.
Report with individual authors
Halvorsen, K., & Mbewe, T. (2023). Food access in small towns: A three-county study. Rural Policy Network. https://www.ruralpolicy.example.org/food-access.pdf
In-text: (Halvorsen & Mbewe, 2023)
Journal article saved as a PDF
Cite it as a journal article. The fact that you downloaded a PDF doesn't change anything.
Varga, L., Okafor, N., & Price, J. (2022). Second seasons in urban gardening programs. Journal of Community Ecology, 14(3), 211–229. https://doi.org/10.0000/jce.2022.0143
In-text: (Varga et al., 2022, p. 215)
The DOI above is a placeholder; real DOIs begin with "10." followed by a registrant code. Include the DOI whenever the article has one.
MLA 9th edition
Report from an organization
When an organization is both the author and the publisher, MLA skips the author and starts with the title.
Microplastics in Estuary Sediments: Regional Survey Results. Coastal Water Research Institute, 2024, www.cwri.example.org/reports/microplastics-2024.pdf.
In-text: (Microplastics in Estuary Sediments 18)
Report with individual authors
Halvorsen, Kari, and Tendai Mbewe. Food Access in Small Towns: A Three-County Study. Rural Policy Network, 2023, www.ruralpolicy.example.org/food-access.pdf.
In-text: (Halvorsen and Mbewe 12)
Journal article
Varga, Lena, et al. "Second Seasons in Urban Gardening Programs." Journal of Community Ecology, vol. 14, no. 3, 2022, pp. 211–29, https://doi.org/10.0000/jce.2022.0143.
In-text: (Varga et al. 215)
MLA allows an optional description at the end of an entry when it helps the reader, such as "PDF download." Many instructors don't require it. If yours does, add it after the URL.
Citation GeneratorAPA, MLA, Chicago and moreChicago style
In Chicago notes-and-bibliography style, reports and articles follow the same patterns as print sources, with a URL or DOI at the end.
Footnote:
- Coastal Water Research Institute, Microplastics in Estuary Sediments: Regional Survey Results, Report No. CWRI-24-07 (Coastal Water Research Institute, 2024), 18, https://www.cwri.example.org/reports/microplastics-2024.pdf.
Bibliography:
Coastal Water Research Institute. Microplastics in Estuary Sediments: Regional Survey Results. Report No. CWRI-24-07. Coastal Water Research Institute, 2024. https://www.cwri.example.org/reports/microplastics-2024.pdf.
Older editions of Chicago also ask for the place of publication (city) before the publisher. Recent guidance has made it optional, so follow the edition your instructor specifies.
Special cases
PDF with no date. In APA, use n.d.: (Coastal Water Research Institute, n.d.). In MLA, leave the date out, and consider adding the date you accessed it at the end: "Accessed 9 Oct. 2026."
PDF with no author. Use the organization responsible. If you can't find one, the title moves into the author position. See in-text citations with no author.
PDF from a course platform. Cite the underlying source if it's a published article or chapter. If it's your instructor's own handout, see how to cite a lecture for course-material formats.
PDF of a book chapter. Cite the chapter within the edited book, including the editors and page range of the chapter.
Scanned PDF with no details. Look at the first and last pages for a copyright line or a library catalog stamp. If you still can't identify it, ask your instructor or librarian whether it's a suitable source.
Common mistakes
- Writing "PDF" as the title or source type. Cite the work, not the file.
- Using the viewer's page count. Use printed page numbers.
- Leaving out the URL or DOI. Readers need a way to find the document.
- Citing a database search page URL. Those links often expire or only work for you. Use the DOI or a stable link.
- Missing the organization as author. Reports from agencies and institutes almost always have one.
Key takeaways
- Identify the source type first; the PDF format doesn't change the citation pattern.
- Pull author, date, title, publisher and DOI or URL from the document itself.
- Use printed page numbers for quotations.
- When guidance seems unclear for an unusual PDF, check your instructor's preferences or the current style guide.
If the PDF is long and you need to understand it before citing, a PDF summarizer can help you find the relevant sections, but always quote and cite from the original pages.