Cita APA (7a ed.)
Garret, W. E. (1990). National Geographic: Vol. 177, no. 1, January 1990. National Geographic Society.
Cita estilo Chicago (17a ed.)
Garret, Wilbur E. National Geographic: Vol. 177, No. 1, January 1990. Washington, EUA: National Geographic Society, 1990.
Cita MLA (9a ed.)
Garret, Wilbur E. National Geographic: Vol. 177, No. 1, January 1990. National Geographic Society, 1990.
Precaución: Estas citas no son 100% exactas.