- Korsgaard, Christine. M., (1996). “Creating the Kingdom of Ends: Reciprocity and responsibility in personal relations”, in her book, Creating the Kingdom of Ends, Cambridge. Cambridge University Press.
- Leibniz, G. W, (2017) Methodus Discendae Doccendaeque Jurisprudentiae, A New Method For Learning And Teaching Jurisprudence.
- Pippin, Robert B., (2014). “Kant’s Theory of Value”. in Inquiry: An Interdisciplinary Journal of Philosophy. London. Routledge. 43:2.
- Kant, Immanuel.,(1989). Idea for a Universal History with a Cosmopolitan Purpose. in Kant Political Writings. Translated and Edited by H. S. Reiss. Cambridge. Cambridge university Press.
- Kant, Immanuel (1996). Critique of Pure Reason, In Critique of Pure Reason; Unified Edition.translated by Werner S. Pluhar, Introduction by Patricia Kitcher. Indianapolis/Cambridge. Hackett Publishing Company, Inc.
- Kant, Immanuel (1999). Groundwork of the metaphysics of Morals, in Practical philosophy.Translated and Edited By Mary J. Gregor. Cambridge. Cambridge University Press.
- Kant, Immanuel (1999). The critique of practical reason, in Practical philosophy.Translated and Edited By Mary J. Gregor. Cambridge. Cambridge University Press.
- Kant, Immanuel (1999).The metaphysics of morals, in Practical philosophy, Translated and Edited By Mary J. Gregor. Cambridge. Cambridge University Press.
- Kant, Immanuel (2001) Religion within the boundaries of mere reason, in Religion and Rational Theology. Translated and Edited by Allen W. Wood and George Di Giovanni. Cambridge. Cambridge University Press
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