SIEBER, P. Bibliographie zur Zwingli-Gedenkfeier des Jahres 1931. Zwingliana, [S. l.], v. 5, n. 8, p. 368–383, 2010. Disponível em: https://zwingliana.ch/index.php/zwa/article/view/1543. Acesso em: 5 mai. 2024.