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-viite (17. p.)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-viite (8. p.)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.
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