What is a DOI and how do I find it?
If you are using the APA format for citing your references for a research paper, you will be asked to include each reference's DOI.
A DOI, or Digital Object Identifier, is a unique code preferred by publishers in the identification and exchange of the content of a digital object, such as a journal article, Web document, or other item of intellectual property. The DOI consists of two parts: a prefix assigned to each publisher by the administrative DOI agency and a suffix assigned by the publisher that may be any code the publisher chooses. DOIs and their corresponding URLs are registered in a central DOI directory.