Cita APA

Knauer, K., & McCann Fenton, M. (2008). Planet Earth: An illustrated history. Time.

Citación estilo Chicago

Knauer, Kelly, and Matthew McCann Fenton. Planet Earth: An Illustrated History. New York: Time, 2008.

Cita MLA

Knauer, Kelly, and Matthew McCann Fenton. Planet Earth: An Illustrated History. Time, 2008.