Eisenstadt, Shmuel Noah
The Political systems of empires
Free Press, 1967
 Buku Teks SO
Abcarian, Gilbert, editor
Contemporary political system
Charles Seribner's, 1970
 Buku Teks
Bluhm, William T.
Theories of the political system / William T. Bluhm
Prentice Hall of India, 1981
 Buku Teks SO
Easton, David
The political system : an inquiry into the state of political science
Knopf, 1971
 Buku Teks SO
Schulte Nordholt, H.G.
The political system of the atoni of Timor
The Hague, 1971
 Buku Teks SO