Rujukan Paus Gregorius II

  1. ↑ Mann, Horace. "Pope St. Gregory II." The Catholic Encyclopedia Vol. 6. New York: Robert Appleton Company, 1909. 18 September 2017
  2. ↑ Levillain, pg. 642
  3. ↑ Mann, pg. 144
  4. ↑ Williams, George L., Papal Genealogy: The Families And Descendants Of The Popes (2004), pg. 37
  5. 1 2 Mann, pg. 145
  6. ↑ Ekonomou, pg. 272; Mann, pg. 133
  7. ↑ Treadgold, pg. 342