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
"Suliman, Mohamed Osman and Economic Research Forum for the Arab Countries, Iran, and Turkey",Trade structure and endogenous restrictions : evidence from Sudan,,"Economic Research Forum for the Arab Countries, Iran & Turkey",1997,Working paper,,,,https://cir.nii.ac.jp/crid/1130000798377255680