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
"Ager, D. E.",Motivation in language planning and language policy,,Multilingual Matters,2001,Multilingual matters,,"1853595292,1853595284",,https://cir.nii.ac.jp/crid/1130000797987833344