De FEO, J. A., & BARNARD, W. W. (2005). Juran institute's six sigma breakthrough and beyond: Quality performance breakthrough methods. Tata McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)De FEO, Joseph A., agus William W. BARNARD. Juran Institute's Six Sigma Breakthrough and Beyond: Quality Performance Breakthrough Methods. New Delhi: Tata McGraw-Hill, 2005.
Lua MLA (9ú heag.)De FEO, Joseph A., agus William W. BARNARD. Juran Institute's Six Sigma Breakthrough and Beyond: Quality Performance Breakthrough Methods. Tata McGraw-Hill, 2005.
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