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
"Claessens, Stijn and Varangis, Panayotis N.",Hedging crude oil imports in developing countries,,World Bank,1991,Policy research working papers,,,,https://cir.nii.ac.jp/crid/1130000794535872896