Mounce, H.O
Hume's narturalism
Routledge , 1999
 Buku Teks SO
Fuller, Lon L.
The morality of law
Yale University Press, 1964
 Buku Teks
Fuller, Lon L.
The morality of law
Yale University Press, 1974
 Buku Teks
Donaldson, Thomas
Corporations and morality
Prentice-Hall, 1981
 Buku Teks
Social justice: from hume to walzer
edited by David Boucher and Paul Kelly
Routledge, 1998
 Buku Teks