Columbia subject headings:
Ethics, Modern.
Hare, R. M. (Richard Mervyn)--Ethics.
Kant, Immanuel, 1724-1804--Ethics.
Singer, Marcus George, 1926-2016--Ethics.
Values.
Harvard subject headings:
Ethics
Hare, R. M. (Richard Mervyn)
Kant, Immanuel, 1724-1804
Singer, Marcus George.
Princeton subject headings:
Ethics, Modern.
Hare, R. M. (Richard Mervyn)
Kant, Immanuel, 1724-1804.
Singer, Marcus George, 1926-
Values.