Kant: Groundwork of the Metaphysics of Morals (Cambridge Texts in the History of Philosophy)
"This is a good translation of Kant's historically important though brief essay on the foundation of moral theory.  Recommended for upper-division undergraduate and graduate students."    Choice"The new translation by the late Mary Gregor of Kant's classic work on moral theory ought to become the standard edition for both ethics and Kant courses."    Ethics