@book{
title = {Arbeitsheft D/D, Teil 1.},
author = {},
editor = {998042461408896 - Frohes Lernen - Teil 1. -  },
editor = {Tit. dalla cop },
editor = {Scritti di vari },
year = {2012},
address = {Wien },
publisher = {Österreichisches Bundesverlag Schulbuch},
}