"Ballygalley"(PDF). Scheduled Historic Monuments (2015). Northern Ireland Environment Agency. Archived from the original(PDF) on 27 April 2015. Retrieved 21 April 2015.
"Ballygalley"(PDF). Scheduled Historic Monuments (2015). Northern Ireland Environment Agency. Archived from the original(PDF) on 27 April 2015. Retrieved 21 April 2015.