Cita APA

Freeman, M. 1., Girard, I., Darondeau, Y., Lioud, C., Priou, E., & Jacquet, L. 1. (2005). March of the penguins. United States: National Geographic.

Citación estilo Chicago

Freeman, Morgan 1937-, Ilan Girard, Yves Darondeau, Christophe Lioud, Emmanuel Priou, y Luc 1967- Jacquet. March of the Penguins. United States: National Geographic, 2005.

Cita MLA

Freeman, Morgan 1937-, et al. March of the Penguins. United States: National Geographic, 2005.