Cita APA (7a ed.)

Hornby, A. S., & Mackin R. (1980). Oxford progressive english alternative course book b (10 ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Hornby, A. S., y Mackin R. Oxford Progressive English Alternative Course Book B. 10 ed. Hong Kong: Oxford University Press, 1980.

Cita MLA (9a ed.)

Hornby, A. S., y Mackin R. Oxford Progressive English Alternative Course Book B. 10 ed. Oxford University Press, 1980.