Richards, J. C., Hull, J., & Proctor, S. (1991). Interchange: English for international communication. Cambridge ; New York: Cambridge University Press.
Trích dẫn kiểu ChicagoRichards, Jack C., Jonathan Hull, và Susan Proctor. Interchange: English for International Communication. Cambridge ; New York: Cambridge University Press, 1991.
MLA引文Richards, Jack C., Jonathan Hull, và Susan Proctor. Interchange: English for International Communication. Cambridge ; New York: Cambridge University Press, 1991.
警告：这些引文格式不一定是100％准确.