Kesetiaan Pelanggan Sangat Esensial dalam Kesuksesan Bisnis Seperti Halnya Garam dan Merica dalam Makan Malam ANDA TELAH MEMBACA CUSTOMER LOYALITY dalam Publisher Weekly, Los Angeles Times, Dallas Morning News, Miami Herald, Kansas City Star, Entrepreneur, Industry Week, Marketing News, Boardroom Reports, Marketing Management, Library Journal, the Selling Advantage, Ideas Magazines, Executives…