McKenna, S. (1946). Everyone's Madonna: The spread of devotion to Our Lady of Perpetual Help, 1866-1946. Mission Church Press.
Lua i Stíl Chicago (17ú heag.)McKenna, Stephen. Everyone's Madonna: The Spread of Devotion to Our Lady of Perpetual Help, 1866-1946. Boston: Mission Church Press, 1946.
Lua MLA (8ú heag.)McKenna, Stephen. Everyone's Madonna: The Spread of Devotion to Our Lady of Perpetual Help, 1866-1946. Mission Church Press, 1946.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.