1. Aquino, T. “De Veritate.” Quaestiones Disputatae. Vol. i. Taurini-Romae: Marietti, 1953.
2. Aquino, T. In Librum de Causis expositio. Turin: Marietti, 1955.
3. Aristotle. De anima. Trad. David Ross. Oxford: Clarendon Press, 1961.
4. Aristotle. De Anima. Books ii and iii (with passages from book i). Trad. David Walter Hamlyn. Oxford: Clarendon Press, 1968.
5. Aristotle. De anima (On the Soul). Trad. Hugh Lawson-Tancred. New York: Penguin Classics, 1986.