Παραπομπή APA
Sproull, B. (2009). The ultimate improvement cycle: Maximizing profits through the integration of lean, six sigma, and the theory of constraints. Boca Raton: CRC Press.
Παραπομπή Chicago StyleSproull, Bob. The Ultimate Improvement Cycle: Maximizing Profits Through the Integration of Lean, Six Sigma, and the Theory of Constraints. Boca Raton: CRC Press, 2009.
Παραπομπή MLASproull, Bob. The Ultimate Improvement Cycle: Maximizing Profits Through the Integration of Lean, Six Sigma, and the Theory of Constraints. Boca Raton: CRC Press, 2009.
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