Cita APA

National Geographic Society. Cartographic Division, Garret, W. E., & Garver, J. B. (1985). Ohio Valley. Washington: The Division.

Citación estilo Chicago

National Geographic Society. Cartographic Division, Wilbur E. Garret, y John B. Garver. Ohio Valley. Washington: The Division, 1985.

Cita MLA

National Geographic Society. Cartographic Division, Wilbur E. Garret, y John B. Garver. Ohio Valley. Washington: The Division, 1985.