Peppers. Don ; Rogers, M. (2005). Return on Customer. Happer Business.
Chicago-čujuhus (17. p.)Peppers. Don ; Rogers, Martha. Return on Customer. New York: Happer Business, 2005.
MLA-čujuhus (9. p.)Peppers. Don ; Rogers, Martha. Return on Customer. Happer Business, 2005.
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