Cita APA

National Geographic Society. Cartographic Division. (1975). The physical world. Washington: [editor no identificado].

Citación estilo Chicago

National Geographic Society. Cartographic Division. The Physical World. Washington: [editor no identificado], 1975.

Cita MLA

National Geographic Society. Cartographic Division. The Physical World. Washington: [editor no identificado], 1975.

Precaución: Estas citas no son 100% exactas.