Works about St. Ignatius of Loyola

• March 12. -- St. Gregory of Great -- from from Lives of the Saints with Reflections for Every Day of the Year
• Catholic Encyclopedia, Volume 7: Gregory XII-Infallability -- from Herbermann, Charles George (1840-1916)
• Ignatius of Loyola, St (1491-1556) -- from Wikipedia Article
• St. Ignatius of Loyola -- from The New Schaff-Herzog Encyclopedia of Religious Knowledge