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SYUKRON, Amin. (2013). SIX SIGMA QUALITY FOR BUSINESS IMPROVEMENT (cet-1). Yogyakarta: PT GRAHA ILMU.

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SYUKRON, Amin. SIX SIGMA QUALITY FOR BUSINESS IMPROVEMENT. cet-1 Yogyakarta: PT GRAHA ILMU, 2013. Text.

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SYUKRON, Amin. SIX SIGMA QUALITY FOR BUSINESS IMPROVEMENT. cet-1 Yogyakarta: PT GRAHA ILMU, 2013. Text.

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SYUKRON, Amin. SIX SIGMA QUALITY FOR BUSINESS IMPROVEMENT. cet-1 Yogyakarta: PT GRAHA ILMU, 2013. Print.