COOPER DONALD R. (2009). BUSINESS RESEARCH METHODS [WITH CD]. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCOOPER DONALD R. BUSINESS RESEARCH METHODS [WITH CD]. NEW DEHLI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCOOPER DONALD R. BUSINESS RESEARCH METHODS [WITH CD]. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2009.
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