Evans, J. R. (2005). An introduction to six sigma & process improvement. Ohio: Thomson south-western.
Čikaški stil citiranjaEvans, James R. An Introduction to Six Sigma & Process Improvement. Ohio: Thomson south-western, 2005.
MLA način citiranjaEvans, James R. An Introduction to Six Sigma & Process Improvement. Ohio: Thomson south-western, 2005.
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