APA (7th ed.) Citation

Kant, I., Gregor, M., & Korsgaard, C. M. (1998). Groundwork of the metaphysics of morals. Cambridge University Press.

Chicago Style (17th ed.) Citation

Kant, Immanuel, Mary Gregor, and Christine M. Korsgaard. Groundwork of the Metaphysics of Morals. Cambridge, Eng: Cambridge University Press, 1998.

MLA (9th ed.) Citation

Kant, Immanuel, et al. Groundwork of the Metaphysics of Morals. Cambridge University Press, 1998.