Cita APA
National Geographic Society (U.S.). (1991). National Geographic picture atlas of our world. The National Geographic Society.
Citación estilo Chicago
National Geographic Society (U.S.). National Geographic Picture Atlas of Our World. Washington D.C: The National Geographic Society, 1991.
Cita MLA
National Geographic Society (U.S.). National Geographic Picture Atlas of Our World. The National Geographic Society, 1991.
Warning: These citations may not always be 100% accurate.