Lucas, R. W. (2005). Customer service: Building successful skills for the twenty-first century (3rd ed.). Boston: McGraw-Hill/Irwin.
استشهاد بنمط شيكاغوLucas, Robert W. Customer Service: Building Successful Skills for the Twenty-first Century. 3rd ed. Boston: McGraw-Hill/Irwin, 2005.
MLA استشهادLucas, Robert W. Customer Service: Building Successful Skills for the Twenty-first Century. 3rd ed. Boston: McGraw-Hill/Irwin, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.