@book{16718,
	author = {Trim, John. and North, Brian },
	title = {Gemeinsamer europäischer Referenzrahmen für Sprachen :},
	publisher = {Langenscheidt,},
	year = {2001.},
	address = { :},
	note = {Niveau A1.A2.B1.B2.C1.C2}
}