APA (7th ed.) Citation

Sagan, C. (1977). The dragons of Eden: Speculations on the evolution of human intelligence. Ballantine boooks.

Chicago Style (17th ed.) Citation

Sagan, Carl. The Dragons of Eden: Speculations on the Evolution of Human Intelligence. New York: Ballantine boooks, 1977.

MLA (8th ed.) Citation

Sagan, Carl. The Dragons of Eden: Speculations on the Evolution of Human Intelligence. Ballantine boooks, 1977.

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