Ray Subhadrata MPE. (2011). Six Sigma: Controlling & Improving Production Process & Quality. MPE-NMIMS.
Chicago Style (17. basım) AtıfRay Subhadrata MPE. Six Sigma: Controlling & Improving Production Process & Quality. Mumbai: MPE-NMIMS, 2011.
MLA (9th ed.) AtıfRay Subhadrata MPE. Six Sigma: Controlling & Improving Production Process & Quality. MPE-NMIMS, 2011.
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