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 "Guild, Elspeth",The legal elements of European identity : EU citizenship and migration law,,Kluwer Law International,2004,Kluwer European law library,,9041123040,,https://cir.nii.ac.jp/crid/1130282271991117184