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Customer genius : becoming a customer-centric business
Fisk, Peter, (2009)
The lovemarks effect : winning in the consumer revolution
Roberts, Kevin W. S., (2006)
Customer relationship management
Peelen, Ed, (2005)
Determining the indirect value of a customer
Ryals, Lynette, (2008)
Managing customers profitably
Implementing sustainable marketing
Ryals, Lynette, (2012)