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. Dept. of Health and Human Services,"Social security programs throughout the world, 1987",,"U.S. Department of Health and Human Services, Social Security Administration, Office of Policy, Office of Research, Statistics, and International Policy",1988,Research report,,,,https://cir.nii.ac.jp/crid/1130000795500544128