Gaya APA

HEO, ., SOON-BONG, . (2010). WHY? ENVIRONMENT/ LINGKUNGAN . Jakarta: PT. ELEX MEDIA KOMPUTINDO.

Gaya MLA

HEO, ., SOON-BONG, . "WHY? ENVIRONMENT/ LINGKUNGAN". Jakarta: PT. ELEX MEDIA KOMPUTINDO, 2010. Text.