APA (7th ed.) Citation

N, E. N., & Ja, N. C. (2011). Why?: Bird/ Burung. PT Elex Media Komputindo.

Chicago Style (17th ed.) Citation

N, Endah Nawang, and Nam Choon Ja. Why?: Bird/ Burung. PT Elex Media Komputindo, 2011.

MLA (8th ed.) Citation

N, Endah Nawang, and Nam Choon Ja. Why?: Bird/ Burung. PT Elex Media Komputindo, 2011.

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