Harris, D. (1969). Testing english as a second language. McGraw-Hill Book.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHarris, David. Testing English as a Second Language. New York, Estados Unidos: McGraw-Hill Book, 1969.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHarris, David. Testing English as a Second Language. McGraw-Hill Book, 1969.
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