@book{431,
	author = {van der Werff, Frauke | Schaeffer, Brigitte},
	title = {Schritte international Neu 5+6 Prüfungsheft Zertifikat B1},
	publisher = {Hueber Verlag, },
	year = {2019},
	address = {Ismaning, Deutschland :},
	edition = {1.Auflage}
}