APA (7th ed.) Citation

National Geographic Society (U.S.). Special Publications Division. (1982). Secret corners of the world. The Society.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.). Special Publications Division. Secret Corners of the World. Washington, D.C: The Society, 1982.

MLA (9th ed.) Citation

National Geographic Society (U.S.). Special Publications Division. Secret Corners of the World. The Society, 1982.

Warning: These citations may not always be 100% accurate.