Peppers Don & Rogers Martha. (2005). Return On Customer: Creating maximum value from your scarcest resource. Currency Books & Doubleday Books.
Citazione stile Chigago Style (17a edizione)Peppers Don e Rogers Martha. Return On Customer: Creating Maximum Value from Your Scarcest Resource. NewYork ,USA: Currency Books & Doubleday Books, 2005.
Citatione MLA (9a ed.)Peppers Don e Rogers Martha. Return On Customer: Creating Maximum Value from Your Scarcest Resource. Currency Books & Doubleday Books, 2005.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.