National Geographic Society (U.S.). Cartographic Division, Shupe, J. F., & Chandler, D. E. (1992). Southwest U.S.A. The Society.
Chicago Style (17th ed.) CitationNational Geographic Society (U.S.). Cartographic Division, John F. Shupe, and David E. Chandler. Southwest U.S.A. Washington, D.C.: The Society, 1992.
MLA (9th ed.) CitationNational Geographic Society (U.S.). Cartographic Division, et al. Southwest U.S.A. The Society, 1992.
Warning: These citations may not always be 100% accurate.