Lucas, R. W. (2005). Customer service: Building successful skills for the twenty-first century. Boston: McGraw-Hill Irwin.
Παραπομπή Chicago StyleLucas, Robert W. Customer Service: Building Successful Skills for the Twenty-first Century. Boston: McGraw-Hill Irwin, 2005.
Παραπομπή MLALucas, Robert W. Customer Service: Building Successful Skills for the Twenty-first Century. Boston: McGraw-Hill Irwin, 2005.
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