Ellsworth, J. W. (1976). Politics and political systems: An introduction to political science. McGraw-Hill.
Citace podle Chicago (17th ed.)Ellsworth, John W. Politics and Political Systems: An Introduction to Political Science. New York: McGraw-Hill, 1976.
Citace podle MLA (9th ed.)Ellsworth, John W. Politics and Political Systems: An Introduction to Political Science. McGraw-Hill, 1976.
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