2Parasuraman A,Zeithaml VA,Berry LL.A conceptual model of service quality and its implications for future research. Journal of Marketing . 1985
3Parasuraman A,Zeithaml V A,Berry L L.SERVQUAL: A Multiple-Item Scale for Measuring Consumer Perceptions of Service Quality. Journal of Retailing . 1988
4John T Mentzer,Daniel J Flint,John L Kent.Developing a Logisitcs Service Quality Scale. Journal of Business . 1999