De naturalibus facultatibus

Περί φυσικῶν δυνάμεων Galen. On the Natural Faculties. Brock, Arthur John, editor. London: William Heinemann Ltd.; Cambridge, MA.: Harvard University Press, 1916. De naturalibus facultatibus Galen. Claudii Galeni Opera Omnia, Volume 2. Kühn, Karl Gottlob, editor. Leipzig: Knobloch, 1821.

On the Natural Faculties (eng) Galen. On the Natural Faculties. Brock, Arthur John, translator. London: William Heinemann Ltd.; Cambridge, MA.: Harvard University Press, 1916.