APA (7th ed.) Citation

Wright, A. L. (1966). Let's Learn english: Beginning course. American Book Company.

Chicago Style (17th ed.) Citation

Wright, Audrey L. Let's Learn English: Beginning Course. New York: American Book Company, 1966.

MLA (9th ed.) Citation

Wright, Audrey L. Let's Learn English: Beginning Course. American Book Company, 1966.