Cita APA (7th ed.)
National Geographic Society. (2004). Africa (1a. ed.). National Geographic Society.
Cita Chicago (17th ed.)
National Geographic Society. Africa. 1a. ed. Buenos Aires: National Geographic Society, 2004.
Cita MLA (9th ed.)
National Geographic Society. Africa. 1a. ed. National Geographic Society, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.