Widdowson, H. G. (1978). Teaching language as communication. Oxford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWiddowson, H. G. Teaching Language as Communication. Great Britain: Oxford University Press, 1978.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWiddowson, H. G. Teaching Language as Communication. Oxford University Press, 1978.
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