Dunphy, W. (1981). Siger de Brabant: Quaestiones in metaphysicam. Institut Superieur de Philosophie.
Cita Chicago (17th ed.)Dunphy, William. Siger De Brabant: Quaestiones in Metaphysicam. Lovaina: Institut Superieur de Philosophie, 1981.
Cita MLA (9th ed.)Dunphy, William. Siger De Brabant: Quaestiones in Metaphysicam. Institut Superieur de Philosophie, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.