Gaya APA

Woon, J, J., Novianti, E, N. (2011). Why?: Experiment & Observation=Percobaan & Pengamatan . Jakarta: PT Elex Media Komputindo.

Gaya MLA

Woon, Jeon, Jae., Novianti, Endah, Nawang. "Why?: Experiment & Observation=Percobaan & Pengamatan". Jakarta: PT Elex Media Komputindo, 2011. Text.