APA (7th ed.) Citation

Asimov, I. (1979). Extraterrestrial civilizations. Crown Publishers.

Chicago Style (17th ed.) Citation

Asimov, Isaac. Extraterrestrial Civilizations. New York: Crown Publishers, 1979.

MLA (9th ed.) Citation

Asimov, Isaac. Extraterrestrial Civilizations. Crown Publishers, 1979.

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