Cita APA (7a ed.)
Garrett, W. E. National geographic: August 1981. National Geographic Society.
Cita estilo Chicago (17a ed.)
Garrett, Wilbur E. National Geographic: August 1981. Washington, EUA: National Geographic Society.
Cita MLA (9a ed.)
Garrett, Wilbur E. National Geographic: August 1981. National Geographic Society.
Precaución: Estas citas no son 100% exactas.