1. Aristotle. (1952). Metaphysics (W. D. Ross, Trans.). In R. Hutchins (Ed.), The works of Aristotle (Vol. 1, pp. 499–631). Encyclopedia Britannica.
2. Beauchamp, T., & Childress, J. (2009). Principles of biomedical ethics (6th ed.). Oxford University Press.
3. de Beauvoir, S. (2011). The second sex (C. Borde & S. Malovany Chevallier, Trans.). Random House.
4. Deligiorgi, K. (2012). The scope of autonomy: Kant and the morality of freedom. Oxford University Press.
5. Descartes, R. (1999). Discourse on method (D. Cress, Trans.). (4th ed.). Hacket.