Raphael, D. D. (1990). Problems of political philosophy: Problems of political philosophy (2nd ed.). Macmillan.
Citazione stile Chigago Style (17a edizione)Raphael, D. D. Problems of Political Philosophy: Problems of Political Philosophy. 2nd ed. Basingstoke: Macmillan, 1990.
Citatione MLA (9a ed.)Raphael, D. D. Problems of Political Philosophy: Problems of Political Philosophy. 2nd ed. Macmillan, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.