Langan, J. (2001). Sentence skills with readings (second edition.). McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLangan, John. Sentence Skills with Readings. second edition. Boston: McGraw-Hill, 2001.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLangan, John. Sentence Skills with Readings. second edition. McGraw-Hill, 2001.
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