Sagan, C. (1973). The cosmic connection: An extraterrestrial perspective. Dell.
Chicago-čujuhus (17. p.)Sagan, Carl. The Cosmic Connection: An Extraterrestrial Perspective. New York: Dell, 1973.
MLA-čujuhus (9. p.)Sagan, Carl. The Cosmic Connection: An Extraterrestrial Perspective. Dell, 1973.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.