Doff, A., & Jones, C. (2000). Language in use: Pre-intermediate (New edition.). Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDoff, Adrian, और Christopher Jones. Language in Use: Pre-intermediate. New edition. Cambridge: Cambridge University Press, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDoff, Adrian, और Christopher Jones. Language in Use: Pre-intermediate. New edition. Cambridge University Press, 2000.
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