Cita APA

National Geographic Book Service (Estados Unidos). (1984). Great rivers of the world (First edition.). Washington, D.C.: National Geographic Society.

Citación estilo Chicago

National Geographic Book Service (Estados Unidos). Great Rivers of the World. First edition. Washington, D.C.: National Geographic Society, 1984.

Cita MLA

National Geographic Book Service (Estados Unidos). Great Rivers of the World. First edition. Washington, D.C.: National Geographic Society, 1984.