After his views were attacked by Johann Eck, Melanchthon replied based on the authority of Scripture in his Defensio contra Johannem Eckium (Wittenberg, 1519).
Johann Eck menyerang pandangannya, dan Melanchthon menjawab berdasarkan otoritas Alkitab dengan karyanya Defensio contra Johannem Eckium (Wittenberg, 1519).