Raphael, D. D. (1990). Problems of political philosophy: Problems of political philosophy (2nd ed.). Macmillan.
Citace podle Chicago (17th ed.)Raphael, D. D. Problems of Political Philosophy: Problems of Political Philosophy. 2nd ed. Basingstoke: Macmillan, 1990.
Citace podle MLA (9th ed.)Raphael, D. D. Problems of Political Philosophy: Problems of Political Philosophy. 2nd ed. Macmillan, 1990.
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