APA (7th ed.) Citation
Garret, W. E. National Geographic: Vol. 177, no. 1, January 1990. National Geographic Society.
Chicago Style (17th ed.) Citation
Garret, Wilbur E. National Geographic: Vol. 177, No. 1, January 1990. Washington, EUA: National Geographic Society.
MLA (9th ed.) Citation
Garret, Wilbur E. National Geographic: Vol. 177, No. 1, January 1990. National Geographic Society.
Warning: These citations may not always be 100% accurate.