Jelaskan Catatan dari Pirro Ligorio

David R. Coffin. "Ligorio, Pirro." Grove Art Online. Oxford Art Online. Oxford University Press, accessed February 12, 2016, http://www.oxfordartonline.com/subscriber/article/grove/art/T051048.                              MORTII MA-TII

The Editors of Encyclopædia Britannica. "Pirro Ligorio." Encyclopædia Britannica Online. Accessed February 12, 2016. http://www.britannica.com/biography/Pirro-Ligorio.

Vasari, Giorgio, and De Vere Gaston Du C. Lives of the Painters, Sculptors and Architects. Vol. 2. New York: Alfred A. Knopf, 1996.