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
"Caferro, William",Mercenary companies and the decline of Siena,,Johns Hopkins University Press,1998,The Johns Hopkins University studies in historical and political science,,0801857880,,https://cir.nii.ac.jp/crid/1130000796259672960