How to format your references using the Proceedings of the National Academy of Sciences of the United States of America citation style
This is a short guide how to format citations and the bibliography in a manuscript for Proceedings of the National Academy of Sciences of the United States of America (PNAS). For a complete guide how to prepare your manuscript refer to the journal's instructions to authors.
Using reference management software
Typically you don't format your citations and bibliography by hand. The easiest way is to use a reference manager:
|Paperpile||The citation style is built in and you can choose it in Settings > Citation Style or Paperpile > Citation Style in Google Docs.|
|EndNote||Find the style here: output styles overview|
|Mendeley, Zotero, Papers, and others||The style is either built in or you can download a CSL file that is supported by most references management programs.|
|BibTeX||BibTeX syles are usually part of a LaTeX template. Check the instructions to authors if the publisher offers a LaTeX template for this journal.|
Those examples are references to articles in scholarly journals and how they are supposed to appear in your bibliography.
Not all journals organize their published articles in volumes and issues, so these fields are optional. Some electronic journals do not provide a page range, but instead list an article identifier. In a case like this it's safe to use the article identifier instead of the page range.
Books and book chapters
Here are examples of references for authored and edited books as well as book chapters.
Sometimes references to web sites should appear directly in the text rather than in the bibliography. Refer to the Instructions to authors for Proceedings of the National Academy of Sciences of the United States of America.
This example shows the general structure used for government reports, technical reports, and scientific reports. If you can't locate the report number then it might be better to cite the report as a book. For reports it is usually not individual people that are credited as authors, but a governmental department or agency like "U. S. Food and Drug Administration" or "National Cancer Institute".
Theses and dissertations
Theses including Ph.D. dissertations, Master's theses or Bachelor theses follow the basic format outlined below.
News paper articles
Unlike scholarly journals, news papers do not usually have a volume and issue number. Instead, the full date and page number is required for a correct reference.
References should be cited in the text by sequential numbers in parentheses:
This sentence cites two references (1, 2).
This sentence cites four references (1–4).
About the journal
|Full journal title||Proceedings of the National Academy of Sciences of the United States of America|
|Abbreviation||Proc. Natl. Acad. Sci. U. S. A.|