Gaya APA

Gareth, W, E. (1989). September 1989: National Geographic (September 1989). Washington D.C: National Geographic.

Gaya MLA

Gareth, Wilbur, E.. "September 1989: National Geographic". September 1989 Washington D.C: National Geographic, 1989. GEN - Bacaan/Seri Non-Fiksi.