Grealy, M. D. (1991). Knock: Apparition Gable from 1879 to the present. Cashin Printing Services.
Lua i Stíl Chicago (17ú heag.)Grealy, Msgr Dominic. Knock: Apparition Gable from 1879 to the Present. Cashin Printing Services, 1991.
Lua MLA (8ú heag.)Grealy, Msgr Dominic. Knock: Apparition Gable from 1879 to the Present. Cashin Printing Services, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.