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
"Schoukens, Paul","The social security systems for self-employed people in the applicant EU countries of Central and Eastern Europe : Bulgaria, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, Romania, Slovak Republic, Slovenia",,Intersentia,2002,Social Europe series,,9050952674,,https://cir.nii.ac.jp/crid/1130282270104449664