So you want to cite a PDF (or a Portable Document Format) file, but don’t know what citation format to use.
Citing PDFs can be a seemingly tricky part of writing a paper. Once you understand the process behind it, however, it becomes a very simple task.
The key to understanding how to cite a PDF is:
Always cite the PDF based on what the source in the file actually is.
A PDF, after all, is not really a source itself, but rather a file type and a way for displaying that source.
For example, if the source you wish to cite is a PDF of a newspaper article, cite the source as you would a newspaper.
Then, depending on the citation style you are using, you can add a short note to the citation that indicates that the source was in PDF format. Here is how you would do this in the three most popular citation styles:
MLA Format Example
Fox, Morgan. “The Underground Railroad.” 2006. PDF file.
APA Format Example
Fox, M. (2008). Indiana income limits. Indiana Government Information. https://www.huduser.org/Datasets/IL/IL08/in_fy2008.pdf
Chicago Format Example
Reilly, Robert. Complicated Relationships. PDF file. September 20, 2017. www.complicatedrelationships.com/amazon.pdf.
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