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
"Modlich, Ralf",The diachronic development of 'ought (to)' and 'should' as an example of Grammaticalization,,GRIN Verlag,2009,Dokument,,9783640540303,,https://cir.nii.ac.jp/crid/1130000797189472896