@book {9783608204445, 
	title = "Sag Ja zum Nein sagen",
	author = "Blaser, Klaus",
	isbn = "9783608204445",
	year = "2020",
	edition = "1",
	url = "http://www.content-select.com/index.php?id=bib_view&ean=9783608204445",
	url = "https://content-select.com/de/portal/media/view/5e14b1f7-d258-42ca-a3e1-0157b0dd2d03",
	publisher = "Klett-Cotta Verlag",
	language = "ger",
}