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
"Jasper, Detlev and Fuhrmann, Horst",Papal letters in the Early Middle Ages,,Catholic University of America Press,2001,History of medieval canon law,,0813209196,,https://cir.nii.ac.jp/crid/1130000794536254464