Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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

Attenzione: Queste citazioni potrebbero non essere precise al 100%.