Should I use a DOI or a URL in my citations?
Most citation styles recommend including a DOI (digital object identifier) number, if available, instead of a URL as DOI numbers can be easily used to find a source by typing them into a search engine like Google.
But a DOI number takes your reader to the website for the source, where they may not be able to access the full text.
For sources found in library databases, it may be a better idea to provide a permanent URL to ensure your professor can access the source.
Check in with them to see which they prefer.
If you need further help, contact a librarian.