Richards, J. C. (1995). Changes: English for international communication. Cambridge: Cambridge University Press.
Trích dẫn kiểu ChicagoRichards, Jack C. Changes: English for International Communication. Cambridge: Cambridge University Press, 1995.
MLA引文Richards, Jack C. Changes: English for International Communication. Cambridge: Cambridge University Press, 1995.
警告:这些引文格式不一定是100%准确.