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
"Blumenthal, Uta-Renate",The investiture controversy : church and monarchy from the ninth to the twelfth century,,University of Pennsylvania Press,1991,Middle Ages series,,0812213866,,https://cir.nii.ac.jp/crid/1130282270547748096