(1959). Foundations of the metaphysics of morals and what is enlightenment? The Bobbs-Merrill.
Cita Chicago (17th ed.)Foundations of the Metaphysics of Morals and What Is Enlightenment? Indianápolis: The Bobbs-Merrill, 1959.
Cita MLA (9th ed.)Foundations of the Metaphysics of Morals and What Is Enlightenment? The Bobbs-Merrill, 1959.
Atenció: Aquestes cites poden no estar 100% correctes.