APA (7th ed.) Citation

Bong, H. S. (2010). Why? Kotoran. Elex Media Komputindo.

Chicago Style (17th ed.) Citation

Bong, Heo Soon. Why? Kotoran. Elex Media Komputindo, 2010.

MLA (8th ed.) Citation

Bong, Heo Soon. Why? Kotoran. Elex Media Komputindo, 2010.

Warning: These citations may not always be 100% accurate.