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Six sigma for dummies
Gygi, Craig, (2005)
Six sigma demystified
Keller, Paul Anton, (2005)
Demystifying six sigma : a company-wide approach to continuous improvement
Larson, Alan, (2003)
Design for Six Sigma : in technology and product development
Creveling, Clyde M., (2003)
Six sigma for marketing processes : an overview for marketing executives, leaders, and managers
Creveling, Clyde M., (2006)