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
"Mehlum, Halvor and Moene, Karl Ove and Torvik, Ragnar and World Institute for Development Economics Research and United Nations University",The market for extortions,,"World Institute for Development Economics Research, United Nations University",2001,WIDER discussion paper,,9524551764,,https://cir.nii.ac.jp/crid/1130282273158146432