Citazione Stile APA (7a Edizione)

Sagan, C. (1973). The cosmic connection: An extraterrestrial perspective. Dell.

Citazione stile Chigago Style (17a edizione)

Sagan, Carl. The Cosmic Connection: An Extraterrestrial Perspective. New York: Dell, 1973.

Citatione MLA (9a ed.)

Sagan, Carl. The Cosmic Connection: An Extraterrestrial Perspective. Dell, 1973.