APA (7th ed.) Citation

Sagan, C., & Druyan, A. (1985). Comet. Random House.

Chicago Style (17th ed.) Citation

Sagan, Carl, and Ann Druyan. Comet. New York: Random House, 1985.

MLA (9th ed.) Citation

Sagan, Carl, and Ann Druyan. Comet. Random House, 1985.

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