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
"Ng'ethe, Njuguna and Ndua, Gichiri",The role of the informal sector in the development of small and intermediate-sized cities : a case study of Nakuru,,"Institute for Development Studies, University of Nairobi",1991,Occasional paper,,,,https://cir.nii.ac.jp/crid/1130000794778916096