Evans, J. R. (2005). An Introduction to SIX SIMA & Process Improvement. Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Evans, James R. An Introduction to SIX SIMA & Process Improvement. New Delhi: Cengage Learning, 2005.
Lua MLA (9ú heag.)Evans, James R. An Introduction to SIX SIMA & Process Improvement. Cengage Learning, 2005.
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