Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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