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 Statistical Office of the European Communities and Germany (West). Statistisches Bundesamt,"Reports on ACP countries, Nigeria",,"Office for Official Publications of the European Communities,UNIPUB [distributor]",1989,Eurostat,,9282607070,,https://cir.nii.ac.jp/crid/1130000798096307328