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
Economist Intelligence Unit,"West Africa : Cameroon, Côte d'Ivoire, Gabon, Ghana, Nigeria, Senegal : economic structure and analysis",,Economist Intelligence Unit,1990,EIU regional reference series,,0850585112,,https://cir.nii.ac.jp/crid/1130282273307024640