Confraternity of Christian Doctrine. (1941). Suggestions for the apostolate to non-Catholics. National Center of the Confraternity of Christian Doctrine.
Παραπομπή σε μορφή Chicago (17η εκδ.)Confraternity of Christian Doctrine. Suggestions for the Apostolate to Non-Catholics. Washington, D.C.: National Center of the Confraternity of Christian Doctrine, 1941.
Παραπομπή σε μορφή MLA (8th εκδ.)Confraternity of Christian Doctrine. Suggestions for the Apostolate to Non-Catholics. National Center of the Confraternity of Christian Doctrine, 1941.
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