Gaya APA

Elvire, M., Atasana, T, N. (1987). Graded Reading Series [Nonfiction - Stage4]: Computer as Friends (Cet. 1.--). Jakarta: Gramedia.

Gaya MLA

Elvire, Maria., Atasana, Th., Nung. "Graded Reading Series [Nonfiction - Stage4]: Computer as Friends". Cet. 1.-- Jakarta: Gramedia, 1987. Text.