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
"Willett, Allan Herbert",The economic theory of risk and insurance,,University of Pennsylvania Press,1951,The S.S. Huebner Foundation for Insurance Education,,,,https://cir.nii.ac.jp/crid/1130000795814724608