Caferro, W. (1998). Mercenary companies and the decline of Siena. Johns Hopkins University studies in historical and political science.
芝加哥风格引文Caferro, William. "Mercenary Companies and the Decline of Siena." Johns Hopkins University Studies in Historical and Political Science 1998.
MLA引文Caferro, William. "Mercenary Companies and the Decline of Siena." Johns Hopkins University Studies in Historical and Political Science, 1998.
警告：这些引文格式不一定是100％准确.