APA-referens (7:e uppl.)

Asimov, I. (1983). The caves of steel (1st Ballantine books ed.). Ballantine Books.

Chicago-referens (17:e uppl.)

Asimov, Isaac. The Caves of Steel. 1st Ballantine books ed. New York: Ballantine Books, 1983.

MLA-referens (8:e uppl.)

Asimov, Isaac. The Caves of Steel. 1st Ballantine books ed. Ballantine Books, 1983.