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