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
"Bar, Christian von and Swann, Stephen and Co-ordinating Group and McCannon, Pádraic and Singleton, E. Susan",Unjustified enrichment (PEL Unj. Enr.),,"Sellier European Law Publishers,Bruylant,Stämpfli",2010,Principles of European law,,"9783727218064,9782802729228,9783935808620",,https://cir.nii.ac.jp/crid/1130282273033338496