Cita APA

National Geographic Society. Cartographic Division, Graves, W., & Shupe, J. F. (1992). British Columbia. Washington, D.C.: National Geographic Society.

Citación estilo Chicago

National Geographic Society. Cartographic Division, William Graves, y John F. Shupe. British Columbia. Washington, D.C.: National Geographic Society, 1992.

Cita MLA

National Geographic Society. Cartographic Division, William Graves, y John F. Shupe. British Columbia. Washington, D.C.: National Geographic Society, 1992.