Ur, P. (2009). Grammar practice activities: A practical guide for teachers (Second edition.). Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUr, Penny. Grammar Practice Activities: A Practical Guide for Teachers. Second edition. Cambridge: Cambridge University Press, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUr, Penny. Grammar Practice Activities: A Practical Guide for Teachers. Second edition. Cambridge University Press, 2009.
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