OWL Chicago Formatting & Style Guide is easy to use and has answers to most of your formatting questions.
Zotero: The Tri-College Libraries recommend Zotero, a free tool that can format your bibliography, keep your citations organized, and even save your articles in the cloud so you can access them later from the library, home, or a cafe. See the Tri-College Guide to Zotero for more details.
EndNote Basic: The Tri-Colleges provide free access to EndNote Basic. See the Tri-College Guide to EndNote Basic for more details.
Any librarian will be happy to give you a tour or a few pointers of the software.
Notes and Bibliography format uses footnotes or endnotes, and a bibliography at the end fo the work. The first note includes the full citation information, and subsequent notes use a shortened form. This format is used by scholars in the arts, history, and humanities. Here are examples for a book and a journal article:
1. Zadie Smith, Swing Time (New York: Penguin Press, 2016), 315–16.
2. Susan Satterfield, “Livy and the Pax Deum,” Classical Philology 111, no. 2
(April 2016): 170.
3. Smith, Swing Time, 320.
4. Satterfield, “Livy,” 172–73.
Satterfield, Susan. “Livy and the Pax Deum.” Classical Philology 111,
no. 2 (April 2016): 165–76.
Smith, Zadie. Swing Time. New York: Penguin Press, 2016.
Author-Date format uses parenthetical in-text citations, and a reference list at the end of the work. This format is used by scholars in the social sciences and sciences. Here are examples for a book and a journal article:
(Smith 2016, 315–160)
(Satterfield 2016, 170)
Satterfield, Susan. 2016. “Livy and the Pax Deum.” Classical Philology 111,
no. 2 (April): 165–76.
Smith, Zadie. 2016. Swing Time. New York: Penguin Press.
For more examples, see the full Author-Date style guide.