APA (7th ed.) Citation

Gutsch, W. A. (1991). The search for extraterrestrial life. Crown Publishers.

Chicago Style (17th ed.) Citation

Gutsch, William A. The Search for Extraterrestrial Life. New York: Crown Publishers, 1991.

MLA (9th ed.) Citation

Gutsch, William A. The Search for Extraterrestrial Life. Crown Publishers, 1991.