, the leading marketers marketing concepts to power ngakhunphap provide the service here or at . than lokkhu expect when their service directory (c) compares with the quality service that the service quality with the expected result key . Dunhuang, the found that the quality of the service actually received through to offer lifting expected sensitivity castings and expect not to use the service, on the other hand, b mot actually received at the service here or than expected Moscow castings are satisfied and to cover one another (Kotler, 2003: 455)
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