Kubiak, T. M., & Benbow, D. W. (2017). The Certified Six Sigma Black Belt Handbook (2nd ed.). Pearson Education India Pvt. Ltd.
Chicago-čujuhus (17. p.)Kubiak, T. M., juo Donald W. Benbow. The Certified Six Sigma Black Belt Handbook. 2nd ed. New Delhi: Pearson Education India Pvt. Ltd, 2017.
MLA-čujuhus (9. p.)Kubiak, T. M., juo Donald W. Benbow. The Certified Six Sigma Black Belt Handbook. 2nd ed. Pearson Education India Pvt. Ltd, 2017.
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