Evans, J. (2007). An Introduction to six sigma and process improvement. Thomson Learning.
Chicago-referens (17:e uppl.)Evans, James. An Introduction to Six Sigma and Process Improvement. New Delhi: Thomson Learning, 2007.
MLA-referens (9:e uppl.)Evans, James. An Introduction to Six Sigma and Process Improvement. Thomson Learning, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.