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
"Sanders, Ivor John",Feudal military service in England : a study of the constitutional and military powers of the barones in medieval England,,Oxford University Press,1956,Oxford historical series,,,,https://cir.nii.ac.jp/crid/1130282269859859584