Joad, C.E.M.
Introduction to modern political theory
Clarendon Press, 1959
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Theory and methods in political science
edited David Marsh and Gerry Stoker
Macmillan, 1995
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Fowler, Robert Booth
Contemporary issues in political theory
Praeger, 1985
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Sabine, George H.
A History of political theory
Henry Holt, 1950
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Sabine, George H.
A history of political theory
Henry Holt , 1955, 1956
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