Παραπομπή σε μορφή APA (7η εκδ.)

Ehrlich, B. H. (2002). Transactional Six Sigma and Lean Servicing: Leveraging manufacturing concepts to achieve world class service. St. Lucie Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ehrlich, Betsi Harris. Transactional Six Sigma and Lean Servicing: Leveraging Manufacturing Concepts to Achieve World Class Service. Boca Raton: St. Lucie Press, 2002.

Παραπομπή σε μορφή MLA (9th εκδ.)

Ehrlich, Betsi Harris. Transactional Six Sigma and Lean Servicing: Leveraging Manufacturing Concepts to Achieve World Class Service. St. Lucie Press, 2002.