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 European Court of Auditors,Improving the security of energy supply by developing the internal energy market : more efforts needed,,Publications Office of the European Union,2015,Special report,,9789287233295,,https://cir.nii.ac.jp/crid/1130282272175364096