APA Citation

Shklovskii, I. S., & Sagan, C. (1966). Intelligent life in the universe. San Francisco, Calif.: Holden-Day.

Chicago Style Citation

Shklovskii, I. S., and Carl Sagan. Intelligent Life in the Universe. San Francisco, Calif.: Holden-Day, 1966.

MLA Citation

Shklovskii, I. S., and Carl Sagan. Intelligent Life in the Universe. San Francisco, Calif.: Holden-Day, 1966.

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