Unruh, J. A. (1996). Customers Mean Business: Six Steps to Building Relationships That Last. Reading, Massachusetts: Addison-Wesley.
Trích dẫn kiểu ChicagoUnruh, James A. Customers Mean Business: Six Steps to Building Relationships That Last. Reading, Massachusetts: Addison-Wesley, 1996.
Trích dẫn MLAUnruh, James A. Customers Mean Business: Six Steps to Building Relationships That Last. Reading, Massachusetts: Addison-Wesley, 1996.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.