Kumar, D. (2006). Six sigma best practices: A guide to business process excellence for diverse industries. J. Ross Pub..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKumar, Dhirendra. Six Sigma Best Practices: A Guide to Business Process Excellence for Diverse Industries. Ft. Lauderdale, Fla.: J. Ross Pub., 2006.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKumar, Dhirendra. Six Sigma Best Practices: A Guide to Business Process Excellence for Diverse Industries. J. Ross Pub., 2006.
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