@book {9783966457293, 
	title = "Das Glücksengelprinzip für ein starkes Selbst",
	isbn = "9783966457293",
	url = "http://www.content-select.com/index.php?id=bib_view&ean=9783966457293",
	url = "https://content-select.com/de/portal/media/view/62309ae0-82f8-482c-bc19-1679b0dd2d03",
	publisher = "BMU Verlag",
}