Australian writing today
edited by Charles Higham
Penguin Books, 1968
 Buku Teks SO
Schmidt, Steffen W.
American Government & politics today
Wadsworth, 2009
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Tucker, William P.
The Mexican government today
University of Minnesota Press, 1958
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Joske, Percy Ernest
Australian federal government
Butterworth, 1967
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Crisp, L.F. (Leslie Finlay)
Australian national government
Longman Chesire, 1965
 Buku Teks SO