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 "Khan, Shaheen",A comparative econometric analysis of informal and formal sectors of employment in Lahore,,"Punjab Economic Research Institute, Lahore",1984,Occasional study,,,,https://cir.nii.ac.jp/crid/1130000796156070784