Printon, J. W. (1936). Our Mother of Perpetual Help: Novena, hymns and prayers (21st ed.). J. S. Paluch Co.
Lua i Stíl Chicago (17ú heag.)Printon, Joseph W. Our Mother of Perpetual Help: Novena, Hymns and Prayers. 21st ed. Chicago: J. S. Paluch Co, 1936.
Lua MLA (8ú heag.)Printon, Joseph W. Our Mother of Perpetual Help: Novena, Hymns and Prayers. 21st ed. J. S. Paluch Co, 1936.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.