American Management Association, Congram, C. A., & Friedman, M. L. (1991). The AMA handbook of marketing for the service industries. American Management Association.
Dyfyniad Arddull ChicagoAmerican Management Association, Carole A. Congram, and Margaret L. Friedman. The AMA Handbook of Marketing for the Service Industries. New York: American Management Association, 1991.
Dyfyniad MLAAmerican Management Association, et al. The AMA Handbook of Marketing for the Service Industries. American Management Association, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.