René-Bazin, M. (1958). A witness of the Invisible: Blessed Mother Mary of Providence foundress of the Helpers of the Holy Souls. Catholic Truth Society.
Lua i Stíl Chicago (17ú heag.)René-Bazin, Marie. A Witness of the Invisible: Blessed Mother Mary of Providence Foundress of the Helpers of the Holy Souls. London: Catholic Truth Society, 1958.
Lua MLA (8ú heag.)René-Bazin, Marie. A Witness of the Invisible: Blessed Mother Mary of Providence Foundress of the Helpers of the Holy Souls. Catholic Truth Society, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.