@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},
}