(Inggris) Harvey McArthur (Summer 1987), "Celibacy in Judaism at the Time of Christian Beginnings", Andrews University Seminary Studies(PDF), Vol. 25, No. 2, Andrews University Press, hlm. 172
(Inggris) Robert Jamieson, A. R. Fausset, David Brown. "Commentary on Matthew 13:56". Commentary, Critical and Explanatory, on the Whole Bible. CCEL.Pemeliharaan CS1: Banyak nama: authors list (link)
cin.org
(Inggris) Br. Anthony Opisso, M.D., Perpetual Virginity of Mary, Association of Hebrew Catholics (retrieved from CIN)
Luther's Works, eds. Jaroslav Pelikan (vols. 1-30) & Helmut T. Lehmann (vols. 31-55), St. Louis: Concordia Pub. House (vols. 1-30); Philadelphia: Fortress Press (vols. 31-55), 1955, v.22:23 / Sermons on John, chaps. 1-4 (1539), quoted in Martin Luther on Mary's Perpetual VirginityDiarsipkan 2008-12-21 di Wayback Machine.[rujukan rusak]
(Inggris) "Paragraph 2. "Conceived by the Power of the Holy Spirit and Born of the Virgin Mary" §499", Catechism of the Catholic Church, Libreria Editrice Vaticana
(Inggris) "Paragraph 2. "Conceived by the Power of the Holy Spirit and Born of the Virgin Mary"", Catechism of the Catholic Church, § 499, Holy See
Luther's Works, eds. Jaroslav Pelikan (vols. 1-30) & Helmut T. Lehmann (vols. 31-55), St. Louis: Concordia Pub. House (vols. 1-30); Philadelphia: Fortress Press (vols. 31-55), 1955, v.22:23 / Sermons on John, chaps. 1-4 (1539), quoted in Martin Luther on Mary's Perpetual VirginityDiarsipkan 2008-12-21 di Wayback Machine.[rujukan rusak]