APA (7th ed.) Citation

Kant, I., & Paton, H. J. (2009). Groundwork of the metaphysic of morals (First Harper Perennial Modern Thought edition.). HarperCollins.

Chicago Style (17th ed.) Citation

Kant, Immanuel, and H. J. Paton. Groundwork of the Metaphysic of Morals. First Harper Perennial Modern Thought edition. New York: HarperCollins, 2009.

MLA (9th ed.) Citation

Kant, Immanuel, and H. J. Paton. Groundwork of the Metaphysic of Morals. First Harper Perennial Modern Thought edition. HarperCollins, 2009.