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.
Chicago-referens (17:e uppl.)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.
MLA-referens (8:e uppl.)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.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.