APA Style

Heo, Soon-Bong. (2011). Why?: Lingkungan (Environment) . Jakarta: PT Elek Media Komputindo.

Chicago Style

Heo, Soon-Bong. Why?: Lingkungan (Environment). Jakarta: PT Elek Media Komputindo, 2011. Text.

MLA Style

Heo, Soon-Bong. Why?: Lingkungan (Environment). Jakarta: PT Elek Media Komputindo, 2011. Text.

Turabian Style

Heo, Soon-Bong. Why?: Lingkungan (Environment). Jakarta: PT Elek Media Komputindo, 2011. Print.