Ukens, L. L. (2007). 101 ways to improve customer service: Training, tools, tips, and techniques. Hoboken, N.J: John Wiley & Sons Inc.
Chicago Style aipamenaUkens, Lorraine L. 101 Ways to Improve Customer Service: Training, Tools, Tips, and Techniques. Hoboken, N.J: John Wiley & Sons Inc, 2007.
MLA aipamenaUkens, Lorraine L. 101 Ways to Improve Customer Service: Training, Tools, Tips, and Techniques. Hoboken, N.J: John Wiley & Sons Inc, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.