Dyfyniad APA

Sagan, C., & Agel, p. J. (1975). The cosmic connection. Coronet Books.

Dyfyniad Arddull Chicago

Sagan, Carl, and prod. Jerome Agel. The Cosmic Connection. Coronet Books, 1975.

Dyfyniad MLA

Sagan, Carl, and prod. Jerome Agel. The Cosmic Connection. Coronet Books, 1975.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.