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Kundennutzen in industriellen Geschäftsbeziehungen
Beutin, Nikolas, (2000)
Market-driven management : how to define, develop, and deliver customer value
Webster, Frederick E. <Jr.>, (2002)
What is the true value of a lost customer?
Hogan, John E., (2002)
Beyond the sales process : 12 proven strategies for a customer-driven world
Andersen, Steve, (2016)