APA (7th ed.) Citation

National Geographic Society (U.S.). Cartographic Division, Vosburgh, F. G., & Chamberlin, W. (1968). The United States. The Society.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.). Cartographic Division, Frederick G. Vosburgh, and Wellman Chamberlin. The United States. Washington: The Society, 1968.

MLA (8th ed.) Citation

National Geographic Society (U.S.). Cartographic Division, et al. The United States. The Society, 1968.