How do I find an article’s DOI?
Answer
If an article has a DOI (Digital Object Identifier), it’s typically included with other basic article information in the library catalog and databases. For example, this record in a library database:
Example in an article full-text PDF:
Another example in an article PDF and the article info on the right (another library database)
You can also try searching for an article in Google or Google Scholar, which may bring you to the publisher website with DOI, if available. Another option to search is in a DOI registration agency like CrossRef -- CrossRef's free DOI lookup.