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Service management and marketing : customer management in service competition
Grönroos, Christian, (2007)
The customer rules : the 14 indespensible, irrefutable, and indisputable qualities of the greatest service companies in the world
Beemer, C. Britt, (2009)
Kunden-Rückgewinnung : erfolgreiches Management für Dienstleister
Seja, Christa, (2000)
Strategic management and marketing in the service sector
Grönroos, Christian, (1985)
From marketing mix to relationship marketing : toward a paradigm shift in marketing
Grönroos, Christian, (1993)