Sagan, C. (1973). The cosmic connection: An extraterrestrial perspective. Dell.
Chicagoスタイル(17版)引用形式Sagan, Carl. The Cosmic Connection: An Extraterrestrial Perspective. New York: Dell, 1973.
MLA(9版)引用形式Sagan, Carl. The Cosmic Connection: An Extraterrestrial Perspective. Dell, 1973.
警告: この引用は必ずしも正確ではありません.