APA aipamena

Sagan, C. (1980). Cosmos. Ballantine Books.

Chicago Style aipamena

Sagan, Carl. Cosmos. New York: Ballantine Books, 1980.

MLA aipamena

Sagan, Carl. Cosmos. Ballantine Books, 1980.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.