Lodge, Rupert
The great thinkers
Routledge, 1949
 Buku Teks SO
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 SO
Ebenstein, William
Great political thinkers: Plato to the present
Rinehart, 1963
 Buku Teks SO
Ebenstein, William
Great political thinkers plato to the present
Rinehart, 1960
 Buku Teks SO