Alexander Abdullah
Filsafat hukum menurut H.L.A. Hart
Program Pascasarjana Universitas Indonesia, 2003
 Artikel Jurnal
Lacey, Nicola
A life of H.L.A. Hart : the nightmare and the noble dream
Oxford University Press, 2006
 Buku Teks SO
Fuller, Lon L.
The morality of law
Yale University Press, 1964
 Buku Teks SO
Fuller, Lon L.
The morality of law
Yale University Press, 1974
 Buku Teks SO
Perry, Michael J.
Morality, politics, and law
Oxford University Press, 1990
 Buku Teks SO