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
"Ryan, Christopher","The Religious roles of the papacy : ideals and realities, 1150-1300",,Pontifical Institute of Mediaeval Studies,1989,Papers in mediaeval studies,,0888448082,,https://cir.nii.ac.jp/crid/1130282270851274368