Creel, Von. "Vaught, Edgar Sullins (1873–1959)". The Encyclopedia of Oklahoma History and Culture. Oklahoma Historical Society. Archived from the original on April 30, 2022. Retrieved October 6, 2022.
O'Dell, Larry. "Urschel Kidnapping". Encyclopedia of Oklahoma History and Culture. Oklahoma Historical Society. Archived from the original on December 28, 2014. Retrieved May 11, 2012.
O'Dell, Larry. "Urschel Kidnapping". Encyclopedia of Oklahoma History and Culture. Oklahoma Historical Society. Archived from the original on December 28, 2014. Retrieved May 11, 2012.
Creel, Von. "Vaught, Edgar Sullins (1873–1959)". The Encyclopedia of Oklahoma History and Culture. Oklahoma Historical Society. Archived from the original on April 30, 2022. Retrieved October 6, 2022.