Harris, D. P. (1969). Testing English as a second language. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHarris, David P. Testing English as a Second Language. New York: McGraw-Hill, 1969.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHarris, David P. Testing English as a Second Language. McGraw-Hill, 1969.
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