Gaya APA
Garrett, W, E. (1988).
September 1988: National Geographic VOL.174, NO.3 (September 1988).
Washington D.C:
National Geographic.
Gaya MLA
Garrett, Wilbur, E..
"September 1988: National Geographic VOL.174, NO.3".
September 1988
Washington D.C:
National Geographic,
1988.
Text.