APA (7th ed.) Citation

Sagan, C., & Agel, J. (1973). The cosmic connection : an extraterrestrial perspective / by Carl Sagan ; produced by Jerome Agel: An extraterrestrial perspective. Hodder and Stoughton.

Chicago Style (17th ed.) Citation

Sagan, Carl, and Jerome Agel. The Cosmic Connection : An Extraterrestrial Perspective / by Carl Sagan ; Produced by Jerome Agel: An Extraterrestrial Perspective. London: Hodder and Stoughton, 1973.

MLA (9th ed.) Citation

Sagan, Carl, and Jerome Agel. The Cosmic Connection : An Extraterrestrial Perspective / by Carl Sagan ; Produced by Jerome Agel: An Extraterrestrial Perspective. Hodder and Stoughton, 1973.

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