Connellan, M. J. R. (1948). Clan Ceithearnaigh: Its whereabouts and extent.
Lua i Stíl Chicago (17ú heag.)Connellan, M. J. Rev. Clan Ceithearnaigh: Its Whereabouts and Extent. 1948.
Lua MLA (9ú heag.)Connellan, M. J. Rev. Clan Ceithearnaigh: Its Whereabouts and Extent. 1948.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
