Cita APA

Richards, J. C., Hull, J., & Proctor, S. (1991). Interchange: English for international communication. New York: Cambridge University Press.

Citación estilo Chicago

Richards, Jack C., Jonathan Hull, y Susan Proctor. Interchange: English for International Communication. New York: Cambridge University Press, 1991.

Cita MLA

Richards, Jack C., Jonathan Hull, y Susan Proctor. Interchange: English for International Communication. New York: Cambridge University Press, 1991.