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.