Cita APA

(1888). National Geographic Magazine [computer file]: The 1970s (vol. 155, no. 4, April 1979) Jan. 1970-April 1973, May 1973-August 1976, September 1976-December 1979. National Geographic Society.

Citación estilo Chicago

National Geographic Magazine [computer File]: The 1970s (vol. 155, No. 4, April 1979) Jan. 1970-April 1973, May 1973-August 1976, September 1976-December 1979. Washington, CD: National Geographic Society, 1888.

Cita MLA

National Geographic Magazine [computer File]: The 1970s (vol. 155, No. 4, April 1979) Jan. 1970-April 1973, May 1973-August 1976, September 1976-December 1979. National Geographic Society, 1888.