Mill, John Stuart
E.P. Dutton and Company, 1955
Buku Teks SO
Angus & Robertson , 1955
Buku Teks SO
Mill, John Stuart
Yayasan Obor Indonesia, 1996
Buku Teks SO
Riley, Jonathan
Routledge, 1998
Buku Teks SO
Laski, Harold J.
George Allen and Unwin, 1948
Buku Teks SO