Kubiak, T. M. (2014). The ASQ pocket guide for the certified six sigma black belt. ASQ Quality Press.
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Chicago-čujuhus (17. p.)
Kubiak, T. M. The ASQ Pocket Guide for the Certified Six Sigma Black Belt. Milwaukee, Wisconsin: ASQ Quality Press, 2014.
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MLA-čujuhus (9. p.)
Kubiak, T. M. The ASQ Pocket Guide for the Certified Six Sigma Black Belt. ASQ Quality Press, 2014.
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