Citations provide the information necessary for readers to identify and retrieve each source you use. When you use someone else's words or ideas in your papers, you should create Text citations or footnotes (within the paper) and References Cited citations (at the end of the paper). Each Text citation or footnote should lead to a References Cited citation, and each References Cited citation should come from an Text citation or footnote.
For articles consulted online, include a DOI or the name of the database in the reference list entry. Many journal articles list a DOI (Digital Object Identifier). A DOI forms a permanent URL that begins https://doi.org/. If you can't find the DOI, list the name of the database instead of the article URL that appears in your browser's address bar.