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
"Hofferth, Sandra L. and National Association for the Education of Young Children and Urban Institute and United States. Children's Bureau","National child care survey, 1990 : a National Association for the Education of Young Children (NAEYC) study",,"Urban Institute Press,Distributed by University Press of America",1991,Urban Institute report,,"0877665044,0877665052",,https://cir.nii.ac.jp/crid/1130282271648171776