When it comes to following a citation style, requirements vary on how closely an author must adhere.
To satisfy a strict editor, especially when you are working without the help of a bibliographic management tool, it is hard to do a good job without access to the complete style manual.
For a journal submission, the guidelines may be no more than a few sample entries. Meanwhile, an examination of articles in the journal shows that the editors probably don't check very carefully.
When you need guidance with a citation style:
Sites like the Purdue Owl help with the basics.
The University Libraries own copies of some style manuals. If they are in print, you will have to share.
Here is a selection of sources you may find helpful (and which suggest other similar sources):
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