Fries, C. (1945). Teaching and learning english as a foreing languaje. University of Michigan.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFries, Charles. Teaching and Learning English as a Foreing Languaje. Ann Arbor: University of Michigan, 1945.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFries, Charles. Teaching and Learning English as a Foreing Languaje. University of Michigan, 1945.
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