APA (7th ed.) Citation

Hawking, L., Hawking, S., & Galfard, C. (2009). El tesoro cósmico (1a ed.). Montena.

Chicago Style (17th ed.) Citation

Hawking, Lucy, Stephen Hawking, and Christophe Galfard. El Tesoro Cósmico. 1a ed. Buenos Aires: Montena, 2009.

MLA (8th ed.) Citation

Hawking, Lucy, et al. El Tesoro Cósmico. 1a ed. Montena, 2009.

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