Duffy, G. L. (2013). The ASQ quality improvement pocket guide: Basic history, concepts, tools, and relationships. ASQ Quality Press.
Citace podle Chicago (17th ed.)Duffy, Grace L. The ASQ Quality Improvement Pocket Guide: Basic History, Concepts, Tools, and Relationships. Milwaukee, Wisconsin: ASQ Quality Press, 2013.
Citace podle MLA (9th ed.)Duffy, Grace L. The ASQ Quality Improvement Pocket Guide: Basic History, Concepts, Tools, and Relationships. ASQ Quality Press, 2013.
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