Fries, C. C. (1945). Teaching and learning English as a foreign language. University of Michigan Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFries, Charles Carpenter. Teaching and Learning English as a Foreign Language. Ann Arbor, MI: University of Michigan Press, 1945.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFries, Charles Carpenter. Teaching and Learning English as a Foreign Language. University of Michigan Press, 1945.
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