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.
Chicago-viite (17. p.)O'Higgins, Brian, ja Ailbhe Ó Monacháin. The Little Book of the Twelve Promises: (the Nine Fridays). Dublin: published by Brian O'Híggins, 56 Parnell Square, 1955.
MLA-viite (8. p.)O'Higgins, Brian, ja Ailbhe Ó Monacháin. The Little Book of the Twelve Promises: (the Nine Fridays). published by Brian O'Híggins, 56 Parnell Square, 1955.
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