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 "Arocena, Pablo and World Institute for Development Economics Research and United Nations University",The reform of the utilities sector in Spain,,"World Institute for Development Economics Research, United Nations University",2001,WIDER discussion paper,,9524551500,,https://cir.nii.ac.jp/crid/1130000797015665536