Gaya APA

choi, yeol. (2010). Why ? Environment (cet.1). Jakarta: PT Elex Media Komputindo.

Gaya Chicago

choi, yeol. Why ? Environment. cet.1 Jakarta: PT Elex Media Komputindo, 2010. Text.

Gaya MLA

choi, yeol. Why ? Environment. cet.1 Jakarta: PT Elex Media Komputindo, 2010. Text.

Gaya Turabian

choi, yeol. Why ? Environment. cet.1 Jakarta: PT Elex Media Komputindo, 2010. Print.