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
"Tabacco, Giovanni",The struggle for power in medieval Italy : structures of political rule,,Cambridge University Press,1989,Cambridge medieval textbooks,,"0521334691,0521336805",,https://cir.nii.ac.jp/crid/1130000796672764160