@book{
title = {Kurs- und Übungsbuch},
author = {Böschel, Claudia},
editor = {Giersberg, Dagmar},
editor = {Hägi, Sara},
editor = {998030709008896 - Ja genau! A1 Band 1 - 1 -  },
year = {2010},
address = {Berlin },
publisher = {Cornelsen},
}