DUTKA, A. (1994). Ama Handbook For Customer Satisfaction Alan Dutka. NTC Business Books.
Dyfyniad Arddull ChicagoDUTKA, Alan. Ama Handbook For Customer Satisfaction Alan Dutka. NTC Business Books, 1994.
Dyfyniad MLADUTKA, Alan. Ama Handbook For Customer Satisfaction Alan Dutka. NTC Business Books, 1994.
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