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
University of Illinois (Urbana-Champaign campus). Bureau of Educational Research,Relation of size of class to school efficiency,,University of Illinois,1922,University of Illinois bulletin,,,,https://cir.nii.ac.jp/crid/1130000794002916480