Gaya APA

Alexander, L, G., Ferguson, P. (1989). Question and answer : graded oral comprehension exercises (Cet. 6). Yogyakarta: Kanisius.

Gaya MLA

Alexander, L., G.., Ferguson, Peter. "Question and answer : graded oral comprehension exercises". Cet. 6 Yogyakarta: Kanisius, 1989. Text.