St. Jerome, "The Perpetual Virginity of Blessed Mary - Against Helvidius", dalam Philip Schaff and Henry Wace (penyunting), Nicene and Post-Nicene Fathers, Second Series, Vol. 6, Translated by W.H. Fremantle, G. Lewis and W.G. Martley (ed. 1893), Buffalo, NY: Christian Literature Publishing Co. (retrieved from New Advent)
