著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL "Kunschak, Claudia",Language variation in foreign language teaching : on the road to communicative competence,,Peter Lang,2004,Duisburger Arbeiten zur Sprach- und Kulturwissenschaft = Duisburg papers on research in language and culture,,"3631531923,0820473820",,https://cir.nii.ac.jp/crid/1130000795069788160