Dirgo, R. (2006). Look forward beyond lean and Six Sigma: A self-perpetuating enterprise improvement method. J. Ross Pub.
Chicago-Zitierstil (17. Ausg.)Dirgo, Robert. Look Forward Beyond Lean and Six Sigma: A Self-perpetuating Enterprise Improvement Method. Fort Lauderdale, Fla: J. Ross Pub, 2006.
MLA-Zitierstil (9. Ausg.)Dirgo, Robert. Look Forward Beyond Lean and Six Sigma: A Self-perpetuating Enterprise Improvement Method. J. Ross Pub, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.