Cita APA

Richards, J. C., Hull, J., & Proctor, S. (1990). Interchange: English for international communication. New York: Cambridge University Press.

Chicago Style Citation

Richards, Jack C., Jonathan Hull, i Susan Proctor. Interchange: English for International Communication. New York: Cambridge University Press, 1990.

Cita MLA

Richards, Jack C., Jonathan Hull, i Susan Proctor. Interchange: English for International Communication. New York: Cambridge University Press, 1990.