Asimov, I. (1983). The caves of steel (1st Ballantine books ed.). Ballantine Books.
Lua i Stíl Chicago (17ú heag.)Asimov, Isaac. The Caves of Steel. 1st Ballantine books ed. New York: Ballantine Books, 1983.
Lua MLA (8ú heag.)Asimov, Isaac. The Caves of Steel. 1st Ballantine books ed. Ballantine Books, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.