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 "Medina, Vicente",Social contract theories : political obligation or anarchy?,,Rowman & Littlefield,1990,Studies in social & political philosophy,,"0847676242,0847676250",,https://cir.nii.ac.jp/crid/1130000794209400832