Mill, John Stuart
David Campbell Publisher, 1992
Buku Referensi
Angus & Robertson , 1955
Buku Teks SO
Mill, John Stuart
Yayasan Obor Indonesia, 1996
Buku Teks SO
Riley, Jonathan
Routledge, 1998
Buku Teks SO
Niskanen, William A.
Aldine-Atherton, 1971
Buku Teks