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
"Perera, P. D. A. and United Nations. Economic and Social Commission for Asia and the Pacific","Emerging issues of population aging in Sri Lanka : report of a study undertaken in Sri Lanka under the project ""Emerging issues of the aging of population""",,"Economic and Social Commission for Asia and the Pacific,United Nations",1989,Asian population studies series,,,,https://cir.nii.ac.jp/crid/1130000795559428480