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Amin Syukron, Muhammad Khoril. (2013). SIX, sigma : quality for business improvement . : Graha Ilmu.

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Amin Syukron, Muhammad Khoril. SIX, sigma : quality for business improvement. : Graha Ilmu, 2013. Text.

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Amin Syukron, Muhammad Khoril. SIX, sigma : quality for business improvement. : Graha Ilmu, 2013. Text.

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Amin Syukron, Muhammad Khoril. SIX, sigma : quality for business improvement. : Graha Ilmu, 2013. Print.