Answered By: Leon Research & Writing Studio
Last Updated: Jan 09, 2018     Views: 939

The DOI number is usually on the first page of an article (top or bottom) and sometimes on the last page. Often a database (Academic Search Complete, PsycInfo) will have the DOI in a searchable field and visible from the full citation. CrossRef.org has a free search for DOI numbers: http://www.crossref.org/guestquery/

The APA Style Blog has a quick tutorial:  DOI Tutorial

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