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 "Jaeggli, Osvaldo and Safir, Kenneth J.",The null subject parameter,,Kluwer Academic Publishers,1989,Studies in natural language and linguistic theory,,"1556080867,1556080875",,https://cir.nii.ac.jp/crid/1130000797023332608