Cita APA (7a ed.)
Garrett, W. E. National geographic: December 1982. National Geographic Society.
Cita estilo Chicago (17a ed.)
Garrett, Wilbur E. National Geographic: December 1982. Washington, EUA: National Geographic Society.
Cita MLA (9a ed.)
Garrett, Wilbur E. National Geographic: December 1982. National Geographic Society.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.