Gaya APA

Ba, I, M. (1955). English by stages : A gratuated course for the learning of english as a second language (First edition). New York: Macmillan and Co.

Gaya MLA

Ba, I, Morris. "English by stages : A gratuated course for the learning of english as a second language". First edition New York: Macmillan and Co, 1955. Text.