You could start at the IUP Libraries Citation Guide at libraryguides.lib.iup.edu/citationstyle. This guide will give you basic information on several different citation styles and examples of the basic citation format. The guide also links to citation builders and managers that you can use to help you create and keep track of your citations.
The Purdue Online Writing Lab website at owl.purdue.edu is a long-time favorite of librarians and faculty. It is a great resource with lots of examples.