Richards, J. C., Hull, J., & Proctor, S. (1994). Interchange: English for international communication. Đà Nẵng : New York: NXb. Đà Nẵng; Cambridge University Press.
Stile di citazione ChicagoRichards, Jack C., Jonathan Hull, e Susan Proctor. Interchange: English for International Communication. Đà Nẵng : New York: NXb. Đà Nẵng; Cambridge University Press, 1994.
Citazione MLARichards, Jack C., Jonathan Hull, e Susan Proctor. Interchange: English for International Communication. Đà Nẵng : New York: NXb. Đà Nẵng; Cambridge University Press, 1994.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.