APA-čujuhus (7. p.)
Dirgo, R. (2005). Look forward beyond lean and Six Sigma. J. Ross Pub..
Chicago-čujuhus (17. p.)
Dirgo, Robert. Look Forward Beyond Lean and Six Sigma. Boca Raton, FL: J. Ross Pub., 2005.
MLA-čujuhus (9. p.)
Dirgo, Robert. Look Forward Beyond Lean and Six Sigma. J. Ross Pub., 2005.
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