Laski, Harold J., author
Liberty in the modern state
George Allen and Unwin, 1948
 Buku Teks
Laski, Harold J., author
Liberty in the modern state
Penguin Books, 1937
 Buku Teks
Mill, John Stuart, author
On liberty and utilitarianism
David Campbell Publisher, 1992
 Buku Referensi
Fromm, Erich, author
Masyarakat yang sehat = The Sane society
Yayasan Obor Indonesia , 1995
 Buku Teks
Liberty in Australia : Australian institute of political science / edited, John Wilkes
Angus & Robertson , 1955
 Buku Teks