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
Toynbee, Arnold J., translator
Experiences
Osford University Press, 1969
 Buku Teks
Friedrich, Carl J.
The Impact of American constitutionalism abroad
Boston University Press, 1967
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Hardin, Russell
Liberalism, constitutionalism and democracy
Oxford University Press, 1999
 Buku Teks