In EBSCOhost subject databases, the DOI will appear near the bottom of the full record view that appears when you click on or select a title and will be labeled DOI.
EBSCOhost occasionally will not include a DOI for an article at all:
Sometimes this is because the journal publishing the article does not assign DOIs, but sometimes the DOI is left off by mistake. You can check to see if an article should have a DOI by using a tool like CrossRef.
On CrossRef, you will switch to the Search Metadata tab and enter the title of the article for you need to find a DOI:
If a DOI is available for the article, CrossRef should include it in the information about the article: