1. "Raphael," The Biography.com, last modified 2015, accessed April 22, 2015, http://www.biography.com/people/raphael-41051
2. Louise Gardener, Art Through the Ages (New York, NY: Harcourt Brace Jovanovich, 1980), [Page #536-539].
3. Of Encyclopedia Britannica, ed., "Raphael- Italian Painter and Architect," Encyclopedia Britannica, last modified August 18, 2014, accessed April 20, 2015, http://www.britannica.com/EBchecked/topic/491442/Raphael
2. Louise Gardener, Art Through the Ages (New York, NY: Harcourt Brace Jovanovich, 1980), [Page #536-539].
3. Of Encyclopedia Britannica, ed., "Raphael- Italian Painter and Architect," Encyclopedia Britannica, last modified August 18, 2014, accessed April 20, 2015, http://www.britannica.com/EBchecked/topic/491442/Raphael