Formerly pretty good free resource for academic citations now turned into a giant pile of steamy hot garbage by the incredible asswipes at Chegg, a corporate name that mostly calls forth the image of a debilitating sexually transmitted infection.
Recommend using instead: https://www.scribbr.com/citation/generator. At least until they also start demanding your firstborn daughter for each citation.
When you have 100s of citations in multiple chapters, it's nice to have. Especially if you can generate them from a PDF of the paper you're trying to cite.