Cita APA (7a ed.)

National Geography Society (Washington, D.C.). (1999). National geographic: En español. National Geographic Society.

Cita Chicago Style (17a ed.)

National Geography Society (Washington, D.C.). National Geographic: En Español. Washington, DC: National Geographic Society, 1999.

Cita MLA (8a ed.)

National Geography Society (Washington, D.C.). National Geographic: En Español. National Geographic Society, 1999.