@book{ title = {Sequenzen }, author = {Frey, Evelyn}, editor = {Dittrich, Roland}, editor = {Il 1. compl. del tit. precede il tit }, editor = {Tit. dell'allegato: Sequenzen : Lösungsschlüssel }, editor = {Tit. sul dorso: Sequenzen : Übungsgrammatik Deutsch }, year = {2005}, address = {Berlin }, publisher = {Cornelsen}, }