Rujukan Persoalan_Rom

  • The Last Days of Papal Rome De Cesare, Raffaele (1909). London: Archibald Constable & Co.  Missing or empty |title= (bantuan)
  • Peter, Hebblethwaite (1987). Pope John XXIII: Shepherd of the Modern World. Garden City, NY: Doubleday. ISBN 0385172982. 
  • Kertzer, David (2004). Prisoner of the Vatican. Boston: Houghton Mifflin Company. ISBN 0618224424. 
  • John F., Pollard (2005). Money and the Rise of the Modern Papacy: Financing the Vatican, 1850–1950. Cambridge: Cambridge University Press. ISBN 0521812046.