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 McCannon, Pádraic and Singleton, Susan",Unjustified enrichment (PEL Unj. Enr.),,Oxford University Press,2010,Principles of European law,,9780199229406,,https://cir.nii.ac.jp/crid/1130000796240239744