APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Sagan, Carl. Cosmos. Ballantine Books, 1980.

Warning: These citations may not always be 100% accurate.