Gaya APA

Heo, Soon-Bong. (2002). Why? Lingkungan . Korea: PT Elex Media Komputindo.

Gaya Chicago

Heo, Soon-Bong. Why? Lingkungan. Korea: PT Elex Media Komputindo, 2002. Text.

Gaya MLA

Heo, Soon-Bong. Why? Lingkungan. Korea: PT Elex Media Komputindo, 2002. Text.

Gaya Turabian

Heo, Soon-Bong. Why? Lingkungan. Korea: PT Elex Media Komputindo, 2002. Print.