RICHARDS, J. C. New Interchange: English for international communication; student-s book 1. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRICHARDS, Jack C. New Interchange: English for International Communication; Student-s Book 1. Cambridge University Press.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRICHARDS, Jack C. New Interchange: English for International Communication; Student-s Book 1. Cambridge University Press.
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