Lucas, R. W. (2005). Customer service: Building successful skills for the twenty-first century (3rd ed.). McGraw-Hill.
Цитирование в стиле Чикаго (17-е изд.)Lucas, Robert W. Customer Service: Building Successful Skills for the Twenty-first Century. 3rd ed. Boston: McGraw-Hill, 2005.
Цитирование MLA (9-е изд.)Lucas, Robert W. Customer Service: Building Successful Skills for the Twenty-first Century. 3rd ed. McGraw-Hill, 2005.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.