DE CASTA ET INTEMERATA VIRGINE MARIA DEIPARA, SERMO HULDRYCHI ZUINGLII.
written by Ulrich Zwingli, 1484-1531; edited by Rudolf Gwalther, 1519-1586 and Leo Jud; in D. Huldrychi Zuinglii de casta, intemerata semperque virgine Maria, matre Iesu Christi redemptoris nostri, sermo, Latinitati donatus, Rodolpho Gualthero interprete. (Zurich, Zurich Canton: Christoph Froschauer (Publisher), 1522), 6-24