Newell, F. (2000). Loyalty.com customer relationship management in the new era of internet marketing. McGraw-Hill.
Chicago-viite (17. p.)Newell, Frederick. Loyalty.com Customer Relationship Management in the New Era of Internet Marketing. McGraw-Hill, 2000.
MLA-viite (8. p.)Newell, Frederick. Loyalty.com Customer Relationship Management in the New Era of Internet Marketing. McGraw-Hill, 2000.
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