APPENDIX DE EUCHARISTIA ET MISSA.
written by Ulrich Zwingli, 1484-1531; edited by Rudolf Gwalther, 1519-1586 and Leo Jud; in Christianae fidei a H. Zuinglio praedicatae, brevis et clara expositio, ab ipso Zuinglio paulò ante mortem eius ad regem Christianum scripta. (Zurich, Zurich Canton: Christoph Froschauer (Publisher), 1536), 21-29