NEWELL FREDERICK. (2000). LOYALTY-COM: CUSTOMER RELATIONSHIP MANAGEMENT IN THE NEW ERA OF INTERNET MARKETING. MCGRAW-HILL.
Lua i Stíl Chicago (17ú heag.)NEWELL FREDERICK. LOYALTY-COM: CUSTOMER RELATIONSHIP MANAGEMENT IN THE NEW ERA OF INTERNET MARKETING. NEW YORK: MCGRAW-HILL, 2000.
Lua MLA (9ú heag.)NEWELL FREDERICK. LOYALTY-COM: CUSTOMER RELATIONSHIP MANAGEMENT IN THE NEW ERA OF INTERNET MARKETING. MCGRAW-HILL, 2000.
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