Cita APA (7a ed.)
Garret, W. E. National Geographic: Vol. 177, no. 3, March 1990. National Geographic Society.
Cita estilo Chicago (17a ed.)
Garret, Wilbur E. National Geographic: Vol. 177, No. 3, March 1990. Washington, EUA: National Geographic Society.
Cita MLA (9a ed.)
Garret, Wilbur E. National Geographic: Vol. 177, No. 3, March 1990. National Geographic Society.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.