The Publication Manual of the American Psychological Association Style (a.k.a. APA Style) is primarily used by researchers and students in the following fields:
What is a DOI?
A DOI (digital object identifier) is a unique number assigned to an article to help with online article retrieval.
Why do I Need it?
APA citation style requires that you include the DOI at the end of your references for both print and electronic articles.
Where can I Find it?
There are three places you can look for an article DOI:
1) On the database search results page within the information about the article.
2) On the first page of the full text of the article.
3) Article DOIs can be looked up using the website crossref.org.
*DOIs can be assigned to an article at any time. Don't assume that an older article won't have a DOI.*
Still Can’t Find it?
APA guidelines state if there is no DOI available then at the end of your citation include “Retrieved From” and the web address for the journal homepage.
Note: Not the direct web address for the article.