00454nam a2200169Ia 450000500170000000800410001702000180005805000200007610000370009624500680013325000120020126000130021326000260022626000090025230000100026165000130027120250603145716.0250603s9999 xx 000 0 und d a9789353160777 aHD 9980.5 .Z45/ aZeithaml, Valarie A... [et al.]. 0aServices marketing : integrating customer focus across the firm a7th ed. aNew York bMcGraw-Hill Education c2019 a582 p aNew York