APA Style

ARIEF, M, I, I., MACCARTHY, M. (1981). Active Mastery in English: various techniques of teaching spoken english . Yogyakarta: Universitas Sanata Dharma.

MLA Style

ARIEF, M., I., INDRIANI., MACCARTHY, MARY. "Active Mastery in English: various techniques of teaching spoken english". Yogyakarta: Universitas Sanata Dharma, 1981. Text.