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Service quality : research perspectives
Schneider, Benjamin, (2004)
Measuring customer service effectiveness
Cook, Sarah, (2004)
Delivering excellent service quality in aviation : a practical guide for internal and external service providers
Kossmann, Mario, (2006)
Winning by telephone : telephione effectiveness for business professionals and consumers
Goodman, Gary S., (1982)
Monitoring, measuring and managing customer service
Goodman, Gary S, (2000)