Cita APA (7th ed.)

McGhee, K., & McKay, G. (2007). Encyclopedia of animals. National Geographic.

Cita Chicago (17th ed.)

McGhee, Karen, i George McKay. Encyclopedia of Animals. Washington, DC: National Geographic, 2007.

Cita MLA (9th ed.)

McGhee, Karen, i George McKay. Encyclopedia of Animals. National Geographic, 2007.