APA (7th ed.) Citation

Sagan, C. (1985). Cosmos (8a ed.). Planeta.

Chicago Style (17th ed.) Citation

Sagan, Carl. Cosmos. 8a ed. Barcelona: Planeta, 1985.

MLA (9th ed.) Citation

Sagan, Carl. Cosmos. 8a ed. Planeta, 1985.

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