@book {9783648104026, 
	title = "Die Kunst der Kundenbeziehung",
	author = "Hafner, Nils",
	isbn = "9783648104026",
	keywords = "Marketing, Kundenbindung, CRM, Customer Relationship Management, Kundenbeziehung",
	url = "http://www.content-select.com/index.php?id=bib_view&ean=9783648104026",
	url = "https://content-select.com/de/portal/media/view/5aa421d9-b0e0-4b0a-82d4-27c2b0dd2d03",
	publisher = "Haufe Lexware",
	language = "ger",
}