Langan, J. (2014). College writing skills with readings 9th ed. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLangan, John. College Writing Skills with Readings 9th Ed. McGraw-Hill, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLangan, John. College Writing Skills with Readings 9th Ed. McGraw-Hill, 2014.
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