Hayek, F.A
Routledge & Kegan Paul, 1973
Buku Teks
Handlin, Oscar, author
Atheneum, 1966
Buku Teks
Mill, John Stuart, author
David Campbell Publisher, 1992
Buku Referensi
Walker, Patrick Gordon, author
Hutchinson & Company, 1951
Buku Teks
Atiyah, P. S.
Clarendon Press, 1981
Buku Teks