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 States. Bureau of the Census,Poverty in the United States : 1988 and 1989,,"U.S. Department of Commerce, Economics and Statistics Administration, Bureau of the Census : for sale by the Superintendent of Documents, U.S. Government Printing Office",1991,Current population reports,,,,https://cir.nii.ac.jp/crid/1130000796075333248