1. Services grow while the quality shrinks;Business Week,1971
2. A boom that's causing trouble;U.S. News and World Report,1979
3. Over and over, its service with a snarl;U.S. News and World Report,1979
4. Editorial;Cassee;International Journal of Hospitality Management,1985
5. Where does the customer fit in a service operation?;Chase;Harvard Business Review,1978