APA (7th ed.) Citation

National Geographic Society (U.S.) & National Geographic Society (U.S.). Cartographic Division. (1990). National Geographic atlas of the world (Sixth edition.). National Geographic Society.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.) and National Geographic Society (U.S.). Cartographic Division. National Geographic Atlas of the World. Sixth edition. Washington, D.C.: National Geographic Society, 1990.

MLA (9th ed.) Citation

National Geographic Society (U.S.) and National Geographic Society (U.S.). Cartographic Division. National Geographic Atlas of the World. Sixth edition. National Geographic Society, 1990.