GILL PRIYA. (2007). BUSINESS PROCESS OUTSOURCING & CALL CENTRE: PROCESS AND STRATEGIES. SRISHTI BOOK DISTRIBUTORS.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGILL PRIYA. BUSINESS PROCESS OUTSOURCING & CALL CENTRE: PROCESS AND STRATEGIES. NEW DELHI: SRISHTI BOOK DISTRIBUTORS, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGILL PRIYA. BUSINESS PROCESS OUTSOURCING & CALL CENTRE: PROCESS AND STRATEGIES. SRISHTI BOOK DISTRIBUTORS, 2007.
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