Cita APA (7a ed.)
National Geographic Society. (2004). Africa (1a. ed.). National Geographic Society.
Cita Chicago Style (17a ed.)
National Geographic Society. Africa. 1a. ed. Buenos Aires: National Geographic Society, 2004.
Cita MLA (9a ed.)
National Geographic Society. Africa. 1a. ed. National Geographic Society, 2004.
Precaución: Estas citas no son 100% exactas.