Cita APA (7th ed.)

English Language Services. (1965). English 900, Book Four. The Macmillan.

Cita Chicago (17th ed.)

English Language Services. English 900, Book Four. New York, Estados Unidos: The Macmillan, 1965.

Cita MLA (9th ed.)

English Language Services. English 900, Book Four. The Macmillan, 1965.