6Meltzer, Penstock and Kan. Customer Satisfaction/Service Quality Research:The Defense Logistics Agency. Journal of Consumer Satisfaction,Dissatisfaction and Complaining Behavior,2003(6) :43 -49.
7Moorman,J. A. Standards for public libraries:A study in quantitative measures of library performance as found in state public library documents. Public Libraries 2007 ( 1/2 ) ,36:32 - 39.