You can find a DOI on the first page of the article
You can find the DOI on the detailed record or information page of the article in most databases.
Different databases will have the DOI in different spots. PubMed puts it at the top of the article.
You can find the DOI by looking on the journal publisher's website.
Google the journal title to find the journal or journal publisher's website. Then use the sites search feature or the archived issues option to find your article and its DOI.
If you can't find the DOI using the methods in the How Do I Find a DOI section, try searching for the article in CrossRef.
Visit CrossRef: search.crossRef.org
Type the title of the article in the search box. Put quotation marks around the title to help narrow your search. You can also search using the author's name, journal title, and publication date.
Search the results list until you find your article.
The DOI will be at the bottom of the result.
If you do not find your article using CrossRef, it would be safe to say it does not have a DOI. You can also ask a librarian to help you locate the DOI.
DOIs or digital object identifiers give many articles a unique combination of letters and numbers that create a stable URL. The stable URL does not change over time and can be used to locate an article on the internet. DOIs are a required piece of an APA citation. However, not all articles or sources will have a DOI. You can take several steps to find a DOI.