APA-Zitierstil (7. Ausg.)

Sagan, C., & Agel, J. (1973). The cosmic connection: An extraterrestrial perspective (First edition.). Anchor Press.

Chicago-Zitierstil (17. Ausg.)

Sagan, Carl, und Jerome Agel. The Cosmic Connection: An Extraterrestrial Perspective. First edition. New York: Anchor Press, 1973.

MLA-Zitierstil (9. Ausg.)

Sagan, Carl, und Jerome Agel. The Cosmic Connection: An Extraterrestrial Perspective. First edition. Anchor Press, 1973.