Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Silberman, Marc and Mueller, Roswitha",Focus : Margarete Steffin,,"International Brecht Society : distribution, University of Wisconsin Press",1994,The Brecht yearbook = Brecht Jahrbuch,,0962320668,,https://cir.nii.ac.jp/crid/1130000794338488448