Frei, F. X. (2012). Uncommon service: How to win by putting customers at the core of your business. Boston, Massachusetts: Harvard Business Review Press.
استشهاد بنمط شيكاغوFrei, Frances X. Uncommon Service: How to Win By Putting Customers At the Core of Your Business. Boston, Massachusetts: Harvard Business Review Press, 2012.
MLA استشهادFrei, Frances X. Uncommon Service: How to Win By Putting Customers At the Core of Your Business. Boston, Massachusetts: Harvard Business Review Press, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.