Barker, E. S. (1960). Greek political theory: Plato and his predecessors. Methuen.
Citace podle Chicago (17th ed.)Barker, Ernest Sir. Greek Political Theory: Plato and His Predecessors. London: Methuen, 1960.
Citace podle MLA (9th ed.)Barker, Ernest Sir. Greek Political Theory: Plato and His Predecessors. Methuen, 1960.
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