Westropp, T. J. (1893). An English round tower.
Lua i Stíl Chicago (17ú heag.)Westropp, Thomas Johnson. An English Round Tower. 1893.
Lua MLA (9ú heag.)Westropp, Thomas Johnson. An English Round Tower. 1893.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
