A DOI, or Digital Object Identifier, is a string of numbers, letters and symbols used to uniquely identify an article or document, and to provide it with a permanent web address (URL).
Where can I find a DOI?
In most scholarly journal articles, the DOI can be usually be found on the first page either below the title or in the header or footer.
What if I don't see the DOI?
Sometimes, databases like EBSCO don't list the DOI in the record. That doesn't mean there isn't a DOI for that article! If you don't see the DOI, look up the article on CrossRef.org. Use the Search Metadata option to check for a DOI for that article.