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
"Wright, Stephen and Economist Intelligence Unit (Great Britain)",Nigeria : the dilemmas ahead : a political risk analysis,,Economist Intelligence Unit,1986,EIU political risk series,,,,https://cir.nii.ac.jp/crid/1130000793947351936