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 "Pennings, F. (Frans)",Introduction to European social security law,2nd ed,Boston : Kluwer Law International,1998,Studies in social policy,,904111033X,,https://cir.nii.ac.jp/crid/1130282271064622976