Newman, J. W. and R. A. Werbel, “Multivariate Analysis of Brand Loyalty for Major Household Appliances,” Journal of Marketing Research, 10, November 1973, pp.404-409.
 Nunnally, J.C., Psychometric Theory, 2nd Edition, New York: McGraw-Hill, 1978.
 Pritchard. M. P., and D. R. Howard, “Analyzing the Commitment-Loyalty Link in Service Contexts,” Journal of the Academy of Marketing Science. Vol. 27, No. 3, 1999, pp.333-348.
 Selin, S., D. R. Howard, E. Udd, and T. Cable., “ An Analysis of Consumer Loyalty to Municipal Recreatin Programs,” Leisure Sciences, 10, 1988, pp.210-223.
 Sirgy, M. J. and Samli, A. C., “A Path Analytic Model of Store Loyalty Involving Self-Concept, Store Image, Geographic Loyalty, and Socioeconomic Status, “ Journal of the Academy of Marketing Science, Vol. 13, Summer 1985, pp.265-291.
32. Sivakumar, K. and S.P. Raj, “Quality Tier Competition: How Price Change Influences Brand Choice and Category Choice,” Journal of Marketing, 61, July 1997, pp.71-84