APA (7th ed.) Citation

Sagan. (1978). The dragons of Eden: Speculations on the evolution of human intelligence (1st Ballantine Books ed.). Ballantine Books.

Chicago Style (17th ed.) Citation

Sagan. The Dragons of Eden: Speculations on the Evolution of Human Intelligence. 1st Ballantine Books ed. New York: Ballantine Books, 1978.

MLA (8th ed.) Citation

Sagan. The Dragons of Eden: Speculations on the Evolution of Human Intelligence. 1st Ballantine Books ed. Ballantine Books, 1978.