Ur, P. (1981). Discussions that work: Task-centred fluency practice. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUr, Penny. Discussions That Work: Task-centred Fluency Practice. Cambridge ; New York: Cambridge University Press, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUr, Penny. Discussions That Work: Task-centred Fluency Practice. Cambridge University Press, 1981.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.