Pontifical Institute of Mediaeval Studies & Ryan, C. (1989). The religious roles of the papacy: Ideals and realities ; 1150-1300. Papers in mediaeval studies.
Citazione stile Chigago Style (17a edizione)Pontifical Institute of Mediaeval Studies e Christopher Ryan. "The Religious Roles of the Papacy: Ideals and Realities ; 1150-1300." Papers in Mediaeval Studies 1989.
Citatione MLA (8a ed.)Pontifical Institute of Mediaeval Studies e Christopher Ryan. "The Religious Roles of the Papacy: Ideals and Realities ; 1150-1300." Papers in Mediaeval Studies, 1989.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.