Gaya APA

w.Drs, L. (1994). English for specific purposes: Dialogues for secretaries 1 (Cet. 1). Jakarta: Gramedia Pustaka Utama.

Gaya MLA

w.Drs, Lukito. "English for specific purposes: Dialogues for secretaries 1". Cet. 1 Jakarta: Gramedia Pustaka Utama, 1994. 400_Language.