Raz, Joseph
The authority of law : essays on law and morality
Oxford Univesity Press, 2009
 Buku Teks
Windolph, F. Lyman
Leviathan and natural law
Princeton University Press, 1951
 Buku Teks SO
Alexander Abdullah
Filsafat hukum menurut H.L.A. Hart
Program Pascasarjana Universitas Indonesia, 2003
 Artikel Jurnal
Finnis, John
Natural law and natural rights
Oxford Univesity Press, 2011
 Buku Teks SO
Anderson, Owen J.
The natural moral law : the good after modernity
Cambridge University Press, 2012
 Buku Teks SO