APA-čujuhus (7. p.)
Ehrlich, B. H. Transactional: Six Sigma and Lean Servicing: Leveraging Manufacturing Concepts to Achieve World-Class Service. St. Lucie Press.
Chicago-čujuhus (17. p.)
Ehrlich, Betsi Harris. Transactional: Six Sigma and Lean Servicing: Leveraging Manufacturing Concepts to Achieve World-Class Service. Boca Ratón, EUA: St. Lucie Press.
MLA-čujuhus (9. p.)
Ehrlich, Betsi Harris. Transactional: Six Sigma and Lean Servicing: Leveraging Manufacturing Concepts to Achieve World-Class Service. St. Lucie Press.
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