Gaya APA

Siswoyo, R, Y., Simamora, C. (2006). Nightfall : the element location . Jakarta: Gramedia Pustaka Utama.

Gaya MLA

Siswoyo, Rizki, Yunanto., Simamora, Christian. "Nightfall : the element location". Jakarta: Gramedia Pustaka Utama, 2006. Book.