O'Higgins, B., & Ó Monacháin, A. (1955). The little book of the twelve promises: (the nine Fridays). published by Brian O'Híggins, 56 Parnell Square.
Lua i Stíl Chicago (17ú heag.)O'Higgins, Brian, agus Ailbhe Ó Monacháin. The Little Book of the Twelve Promises: (the Nine Fridays). Dublin: published by Brian O'Híggins, 56 Parnell Square, 1955.
Lua MLA (8ú heag.)O'Higgins, Brian, agus Ailbhe Ó Monacháin. The Little Book of the Twelve Promises: (the Nine Fridays). published by Brian O'Híggins, 56 Parnell Square, 1955.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.