APA (7th ed.) Citation

Karnazes, D. (2007). Ultramaratón (1a. ed.). Paidotribo.

Chicago Style (17th ed.) Citation

Karnazes, Dean. Ultramaratón. 1a. ed. Barcelona: Paidotribo, 2007.

MLA (9th ed.) Citation

Karnazes, Dean. Ultramaratón. 1a. ed. Paidotribo, 2007.