Cita APA

National Geographic Society. (1990). National Geographic atlas of the world (Sixxth Editon.). United States of America: National Geographic Society.

Citación estilo Chicago

National Geographic Society. National Geographic Atlas of the World. Sixxth Editon. United States of America: National Geographic Society, 1990.

Cita MLA

National Geographic Society. National Geographic Atlas of the World. Sixxth Editon. United States of America: National Geographic Society, 1990.

Precaución: Estas citas no son 100% exactas.