Richards, J. C. (2003). New interchange: English for internaional communication intro workbook. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRichards, Jack C. New Interchange: English for Internaional Communication Intro Workbook. Cambridge: Cambridge University Press, 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRichards, Jack C. New Interchange: English for Internaional Communication Intro Workbook. Cambridge University Press, 2003.
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