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 Commission of the European Communities,Competition law in the European Communities (situation at 31 December 1989),,Office for Offical Publications of the European Communities,1990,,,,,https://cir.nii.ac.jp/crid/1130282270697437440