Gaya APA

Ridout, R. (1961). International english : First steps in learning to read and write english as a foreign language book 5 . New York: Macmillan and Co.

Gaya MLA

Ridout, Ronald. "International english : First steps in learning to read and write english as a foreign language book 5". New York: Macmillan and Co, 1961. Text.