Laski, Harold J.
Liberty in the modern state
Penguin Books, 1937
 Buku Teks
Handlin, Oscar
The dimensions of liberty
Atheneum, 1966
 Buku Teks
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
Liberty in Australia : Australian institute of political science / edited, John Wilkes
Angus & Robertson , 1955
 Buku Teks