The Oxford dictionary of popes /

Míreanna comhchosúla

• Keepers of the keys : a history of the popes from St. Peter to John Paul ll /
  de réir: Cheetham, Nicholas
  Foilsithe / Cruthaithe: (1982)
• Ten popes who shook the world
  de réir: Duffy, Eamon
  Foilsithe / Cruthaithe: (2011)
• Pope, church, and city essays in honour of Brenda M. Bolton /
  Foilsithe / Cruthaithe: (2004)
• The oxford dictionary of Popes /
  de réir: Kelly, J.N.D
  Foilsithe / Cruthaithe: (1986)
• Popes and antipopes the politics of eleventh century church reform /
  de réir: Stroll, Mary
  Foilsithe / Cruthaithe: (2012)