Gaya APA

W, L. (1986). Dialogues For Secretaries: English For Specific Purposes Jilid.1 (--). Jakarta: Gramedia Pustaka Utama.

Gaya MLA

W, Lukito. "Dialogues For Secretaries: English For Specific Purposes Jilid.1". -- Jakarta: Gramedia Pustaka Utama, 1986. Text.