32. Rigby & Ledingham (2004) CRM Done Right P as la peine – ne rien faire ou donner $100 à tous -> $800K Faut un système moins cher ou plus performant.
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35. Frow, PE and AF Payne, (2009) Customer Relationship Management: A Strategic Perspective
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37. King, SF and TF Burgess (2008) Understanding success and failure in CRM