APA (7th ed.) Citation

National Geographic Society (U.S.). (1989). Nature's wonderlands: National parks of the world. National Geographic Society.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.). Nature's Wonderlands: National Parks of the World. Washington, D.C.: National Geographic Society, 1989.

MLA (9th ed.) Citation

National Geographic Society (U.S.). Nature's Wonderlands: National Parks of the World. National Geographic Society, 1989.

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