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
"Sahal, Ibrahim Mohamed G.",Crossing the poverty line : the destiny of Sudanese middle-class public sector employees,,Organization for Social Science Research in Eastern and Southern Africa,1999,Social science research report series,,,,https://cir.nii.ac.jp/crid/1130282268651201664