Customer Relationship Management: Electronic Customer Care in the New Economy 2002 · ENGLISH · PDF View details →
Electronic Customer Care: Die Anbieter-Kunden-Beziehung im Informationszeitalter 2001 · GERMAN · PDF View details →
Electronic Customer Care: Die Anbieter-Kunden-Beziehung im Informationszeitalter 2000 · GERMAN · PDF View details →
