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 "Ammon, Ulrich and Charlston, David",The position of the German language in the world,,Routledge,2020,Routledge handbooks,,9781138717657,,https://cir.nii.ac.jp/crid/1130566852243477120