Minor, David (June 15, 2010). "Princeton, TX (Collin County)". Texas State Historical Association. Archived from the original on October 16, 2012. Retrieved February 21, 2013.
Minor, David (June 15, 2010). "Princeton, TX (Collin County)". Texas State Historical Association. Archived from the original on October 16, 2012. Retrieved February 21, 2013.