APA (7th ed.) Citation

National Geographic Society, Grosvenor, M. B., & Chamberlin, W. (1966). National Geographic atlas of the world (Enl. 2nd ed.). National Geographic Society.

Chicago Style (17th ed.) Citation

National Geographic Society, Melville Bell Grosvenor, and Wellman Chamberlin. National Geographic Atlas of the World. Enl. 2nd ed. Washington: National Geographic Society, 1966.

MLA (9th ed.) Citation

National Geographic Society, et al. National Geographic Atlas of the World. Enl. 2nd ed. National Geographic Society, 1966.