Peppers Don & Rogers Martha. (2005). Return On Customer: Creating maximum value from your scarcest resource. Currency Books & Doubleday Books.
Chicago-viite (17. p.)Peppers Don ja Rogers Martha. Return On Customer: Creating Maximum Value from Your Scarcest Resource. NewYork ,USA: Currency Books & Doubleday Books, 2005.
MLA-viite (9. p.)Peppers Don ja Rogers Martha. Return On Customer: Creating Maximum Value from Your Scarcest Resource. Currency Books & Doubleday Books, 2005.
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