A DOI (or Digital Object Identifier) is used to reliably identify digital content. They’re most often assigned to journal articles, but they can also be assigned to books, videos, infographics — basically anything you can find on the web. The DOI works as a link that will bring you straight to the source text, which means you don’t have to scour the internet for that obscure reference in Footnote #7.
Finding the DOI for an NAP Title
The DOI for a given report can be found in several places, both on the site and in the PDF.
When you first arrive on a report’s catalog page, you’ll probably be on the Overview tab. Scroll down to “Publication Info,” and you’ll see the report’s DOI listed under the ISBN.
If you switch over to the Research tab, you'll find the DOI included at the end of the "Suggested Citation."
When you download the PDF, the DOI is conveniently located on the cover page right next to the ISBN. Note: The PDFs are in the process of getting the DOIs added to the cover page, so if you don’t see it yet, you will soon.
Finally, each report's DOI has been embedded into its PDF. If you use a reference manager like Zotero, Endnote, or Mendeley, this makes it easier to look up information about the book and cite it in your research.