Duffy, G. L. (2014). Modular kaizen: Continuous and breakthrough improvement. ASQ Quality Press.
Lua i Stíl Chicago (17ú heag.)Duffy, Grace L. Modular Kaizen: Continuous and Breakthrough Improvement. Milwaukee, Wisconsin: ASQ Quality Press, 2014.
Lua MLA (9ú heag.)Duffy, Grace L. Modular Kaizen: Continuous and Breakthrough Improvement. ASQ Quality Press, 2014.
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