Clarke, Stephen
Black Swan, 2015
Buku Teks
Funk, Arthur Layton
Norman University of Oklahoma Press, 1959
Buku Teks
Schuman, Frederick L.
Whittlesey House, 1931
Buku Teks
Shklar, Judith N.
Pustaka Utama Grafiti, 1996
Buku Teks
Montesquieu, Charles de Secondat,1689-1755
Edition du Seuil, 1953
Buku Teks