Graves, J. R. (1867). Round Towers in Ireland.
Lua i Stíl Chicago (17ú heag.)Graves, James Rev. Round Towers in Ireland. 1867.
Lua MLA (9ú heag.)Graves, James Rev. Round Towers in Ireland. 1867.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
