Cita APA

National Geographic Society. Cartographic Division, Garver, J. B., Graves, W., & Barry, C. M. (1991). Europe and North Africa. Washington, D.C.: National Geographic Society.

Citación estilo Chicago

National Geographic Society. Cartographic Division, John B. Garver, William Graves, y Cynthia M. Barry. Europe and North Africa. Washington, D.C.: National Geographic Society, 1991.

Cita MLA

National Geographic Society. Cartographic Division, John B. Garver, William Graves, y Cynthia M. Barry. Europe and North Africa. Washington, D.C.: National Geographic Society, 1991.