Watkins, C. (2002). Marketing, sales and customer services: Understanding the theory and practice of selling through service. Institute of Financial Services ; A.I.T.B.S. Publishers & Distributors.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWatkins, Charley. Marketing, Sales and Customer Services: Understanding the Theory and Practice of Selling Through Service. Canterbury : New Delhi: Institute of Financial Services ; A.I.T.B.S. Publishers & Distributors, 2002.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWatkins, Charley. Marketing, Sales and Customer Services: Understanding the Theory and Practice of Selling Through Service. Institute of Financial Services ; A.I.T.B.S. Publishers & Distributors, 2002.
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