APA (7 वां संस्करण) प्रशस्ति पत्र
Ur, P. (1991). A course in language teaching: Practice and theory (1a. ed.). Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Ur, Penny. A Course in Language Teaching: Practice and Theory. 1a. ed. Estados Unidos: Cambridge University Press, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Ur, Penny. A Course in Language Teaching: Practice and Theory. 1a. ed. Cambridge University Press, 1991.
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