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
"Ajayi, Simeon Ibidayo and African Economic Research Consortium",Macroeconomic approach to external debt : the case of Nigeria,,Initiatives Publishers,1991,AERC research paper,,,,https://cir.nii.ac.jp/crid/1130282269924559616