APA引文

Powell, J. M. (2014). The Papacy, Frederick II and communal devotion in medieval Italy. Variorum collected studies series.

Chicago Style (17th ed.) Citation

Powell, James M. "The Papacy, Frederick II and Communal Devotion in Medieval Italy." Variorum Collected Studies Series 2014.

MLA引文

Powell, James M. "The Papacy, Frederick II and Communal Devotion in Medieval Italy." Variorum Collected Studies Series, 2014.

警告：這些引文格式不一定是100％准確.