APA

National Geographic Society, . (1994). Verdaderos animales salvajes. s.l: National Geographic Society.

Chicago

National Geographic Society, . 1994. Verdaderos animales salvajes. s.l: National Geographic Society.

Harvard

National Geographic Society, . (1994). Verdaderos animales salvajes. s.l: National Geographic Society.

MLA

National Geographic Society, . Verdaderos animales salvajes. s.l: National Geographic Society. 1994.