Gaya APA

Alexander, L, G. (1994). Practice and progress : an integrated course for pre inter mediate students (Cet. ke-17). Yogyakarta: Kanisius.

Gaya MLA

Alexander, L., G.. "Practice and progress : an integrated course for pre inter mediate students". Cet. ke-17 Yogyakarta: Kanisius, 1994. Text.