Richards, J. C., Hull, J., & Proctor, S. (2005). New Interchange 1: English for international communication. Workbook. United Kingdom: Cambridge University Press.
Dyfyniad Arddull ChicagoRichards, Jack C., Jonathan Hull, và Susan Proctor. New Interchange 1: English for International Communication. Workbook. United Kingdom: Cambridge University Press, 2005.
Dyfyniad MLARichards, Jack C., Jonathan Hull, và Susan Proctor. New Interchange 1: English for International Communication. Workbook. United Kingdom: Cambridge University Press, 2005.
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