APA (7th ed.) Citation

National Geographic Society (U.S.). (1986). A World of things to do. National Geographic Society.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.). A World of Things to Do. Washington, D.C.: National Geographic Society, 1986.

MLA (9th ed.) Citation

National Geographic Society (U.S.). A World of Things to Do. National Geographic Society, 1986.

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