Gaya APA

Gusnidar, T, I, N, B, I. (1999). Window On The World: a new approach to learning English based on the 1994 curriculum (Cet. 2). Jakarta: Erlangga.

Gaya MLA

Gusnidar, Tim, Instruktur, Nasional, Bahasa, Inggris,. "Window On The World: a new approach to learning English based on the 1994 curriculum". Cet. 2 Jakarta: Erlangga, 1999. Text.