APA (7th ed.) Citation

National Geographic Society (U.S.). Cartographic Division, Chamberlin, W., & Grazzini, A. D. (1967). Viet Nam, Cambodia, Laos, and Thailand. The Society.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.). Cartographic Division, Wellman Chamberlin, and Athos D. Grazzini. Viet Nam, Cambodia, Laos, and Thailand. Washington, D.C.: The Society, 1967.

MLA (8th ed.) Citation

National Geographic Society (U.S.). Cartographic Division, et al. Viet Nam, Cambodia, Laos, and Thailand. The Society, 1967.