หนังสือที่แต่งโดย Zemke, Ron 5 Results

No.TitlePublished
1Service magic [electronic resource] : the art of amazing your customers2003
2E-service : 24 ways to keep your customers when the competition is just a click way2001
3Generations at work : managing the clash of veterans, boomers, xers, and nexters in your workplace2000
4The Services edge : 101 companies that profit from customer care1989
5The service edge : 101 companies that profit from customer card1989