Laski, Harold J.
Liberty in the modern state
George Allen and Unwin, 1948
 Buku Teks SO
Handlin, Oscar
The dimensions of liberty
Atheneum, 1966
 Buku Teks SO
MacIver, Robert M.
The modern state
Oxford, 1926
 Buku Teks SO
Mill, John Stuart
On liberty and utilitarianism
David Campbell Publisher, 1992
 Buku Referensi
Lindsay, A.D.
The modern democratic state
Oxford University Press, 1959
 Buku Teks SO