Frei, F., & Morriss, A. (2012). Uncommon service: How to win by putting customers at the core of your business. Boston, Mass.: Harvard Business Review Press.
Trích dẫn kiểu ChicagoFrei, Frances., và Anne Morriss. Uncommon Service: How to Win By Putting Customers At the Core of Your Business. Boston, Mass.: Harvard Business Review Press, 2012.
Trích dẫn MLAFrei, Frances., và Anne Morriss. Uncommon Service: How to Win By Putting Customers At the Core of Your Business. Boston, Mass.: Harvard Business Review Press, 2012.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.