6Laczniak, Gene R.. Framework for Analysing Marketing Ethics.Journal of Macromarketing, Spring 1983, Issue 1, 7-18.
7Garrett, Thomas. Business Ethics, Englewood Cliffs, NJ: PrenticeHall. 1966.
8A. Parasuraman; Valarie A. Zeithaml; Leonard L. Berry.Conceptual Model of Service Quality and its Implications for Future Research. Journal of Marketing, Vol.49 (1985), pp. 41-45.
9A. Parasuraman; Valarie A. Zeithaml; Leonard L.Berry.SERVQUAL: A Multiple-item Scale for Measuring Consumer Perceptions of Service Quality, Journal of Retailing, Vol.64. No1,Spring 1988.