Gregório Taumaturgo. «13». Oração e Panegírico a Orígenes. The Method Which Origen Used in His Theological and Metaphysical Instructions. He Commends the Study of All Writers, the Atheistic Alone Excepted. The Marvellous Power of Persuasion in Speech. The Facility of the Mind in Giving Its Assent. (em inglês). I. [S.l.: s.n.]