APA (7e ed.) Bronvermelding
Grosvenor, M. B. National Geographic: Vol. 138, no. 2, August 1970. National Geographic Society.
Chicago (17e ed.) Bronvermelding
Grosvenor, Melville Bell. National Geographic: Vol. 138, No. 2, August 1970. Washington, EUA: National Geographic Society.
MLA (9e ed.) Bronvermelding
Grosvenor, Melville Bell. National Geographic: Vol. 138, No. 2, August 1970. National Geographic Society.
Let op: Deze citaties zijn niet altijd 100% accuraat.