Pojman, Louis P.
Environmental ethics : readings on theory and application
Wadsworth and Cengage Learning, 2012
 Buku Teks
Lewis, Barry
Understanding humans: introduction to physical anthropology and archaeology
Wadsworth and Cengage Learning, 2013
 Buku Teks
Warburton, Nigel, 1962-
Freedom : an introduction with readings
Routledge, 2001
 Buku Teks
Gensler, Harry J., 1945-
Ethics : a contemporary introduction
Routledge, 1998
 Buku Teks
Albert, Ethel M.
Great traditions in ethics: an introduction
American Book Company, 1953
 Buku Teks