@book{737,
	author = {Ballweg, Sandra and Drumm, Sandra},
	title = {DLL 02 : Wie lernt man die Fremdsprache Deutsch?},
	publisher = {Goethe-Institut e.V,},
	year = {2013},
	address = {München : },
	edition = {1.Auflage},
	url = {https://www.goethe.de/de/spr/unt/dll.html}
}