APA (7th ed.) Citation

Asimov, I. (1988). Prelude to foundation. Doubleday.

Chicago Style (17th ed.) Citation

Asimov, Isaac. Prelude to Foundation. New York: Doubleday, 1988.

MLA (9th ed.) Citation

Asimov, Isaac. Prelude to Foundation. Doubleday, 1988.

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