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
United Nations. Dept. of Public Information,The United Nations and the situation in Angola : May 1991-February 1995,,United Nations,1995,Reference paper,,,,https://cir.nii.ac.jp/crid/1130282270231993728