Cita APA

Carl Sagan. (1977). The dragons of eden: Speculations on the evolution of human intelligence. Ballantine books.

Chicago Edition Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.