APA (7th ed.) Citation

Asimov, I. (1991). Foundation (Bantam ed.). Bantam Books.

Chicago Style (17th ed.) Citation

Asimov, Isaac. Foundation. Bantam ed. New York: Bantam Books, 1991.

MLA (8th ed.) Citation

Asimov, Isaac. Foundation. Bantam ed. Bantam Books, 1991.

Warning: These citations may not always be 100% accurate.