Watson, Adam
The Limits of independence : relations between states in the modern world
Routledge , 1997
 Buku Teks SO
Andrews, William G.
Constitutions and constitutionalism
D.van Nostrand Company,Inc., 1968
 Buku Teks
The twilight of constitutionalism?
Petra Dobner, Martin Loughlin, editors
Oxford University Press, 2012
 Buku Teks SO
Kagan, Shelly
Normative Ethics
Westview Press, 1997
 Buku Teks SO
Friedrich, Carl J.
The Impact of American constitutionalism abroad
Boston University Press, 1967
 Buku Teks