Evans, J. (2007). An Introduction to six sigma and process improvement. Thomson Learning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEvans, James. An Introduction to Six Sigma and Process Improvement. New Delhi: Thomson Learning, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रEvans, James. An Introduction to Six Sigma and Process Improvement. Thomson Learning, 2007.
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