A lot of the heavy lifting of citations is just good intellectual hygiene, because it has to do with giving credit where its due and helping others find things, too.
It shows which ideas you're choosing to interact with, and whose the are, and, ultimately, a researcher could go back and read the influences within the sources you used, and on and on.
The basics are usually pretty much the same, across formats. You should always be noting:
Author or Creator (Who made this?)
Title or name OF ARTICLE or CHAPTER etc. (What is this?)
Title or name of CONTAINER, like a JOURNAL NAME or WEBSITE etc. (How was this published/distributed?)
PAGE numbers of SPECIFIC IDEAS
LOCATION of source (DOI/URL)