Andrews, William G.
D.van Nostrand Company,Inc., 1968
Buku Teks
Petra Dobner, Martin Loughlin, editors
Oxford University Press, 2012
Buku Teks SO
Fergany, Nader
Palgrave Macmillan, 2016
Buku Teks SO
Arendt, Hannah, 1906-1975
Penguin, 1965
Buku Teks SO
Friedrich, Carl J.
Boston University Press, 1967
Buku Teks