Unruh, J. A. (1996). Customers Mean Business: Six Steps to Building Relationships That Last. Reading, Massachusetts: Addison-Wesley.
استشهاد بنمط شيكاغوUnruh, James A. Customers Mean Business: Six Steps to Building Relationships That Last. Reading, Massachusetts: Addison-Wesley, 1996.
MLA استشهادUnruh, James A. Customers Mean Business: Six Steps to Building Relationships That Last. Reading, Massachusetts: Addison-Wesley, 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.