Gupta, P. (2007). Six Sigma Business scorecard: Creating a comprehensive corporate performance measurement system (2nd ed.). McGraw-Hill.
Citace podle Chicago (17th ed.)Gupta, Praveen. Six Sigma Business Scorecard: Creating a Comprehensive Corporate Performance Measurement System. 2nd ed. New York: McGraw-Hill, 2007.
Citace podle MLA (9th ed.)Gupta, Praveen. Six Sigma Business Scorecard: Creating a Comprehensive Corporate Performance Measurement System. 2nd ed. McGraw-Hill, 2007.
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