Lodge, Rupert
The great thinkers
Routledge, 1949
Buku Teks
100 (one hundred) great kings, queens and rulers of the world
edited by John Canning
Taplinger, 1967
Buku Referensi
Seagle, William
Men of law from Hammurabi to Holmes
Hafner Publising Copmpany, 1971
Buku Teks
Ebenstein, William
Great political thinkers: Plato to the present
Rinehart, 1963
Buku Teks
Ebenstein, William
Great political thinkers : Plato to the present
Thomson Learning, 2000
Buku Teks