Friedrich, C. J. (1968). Constitutional government and democracy: Theory and practice in Europe and America (4th ed.). Oxford & IBH.
Chicago-viite (17. p.)Friedrich, Carl J. Constitutional Government and Democracy: Theory and Practice in Europe and America. 4th ed. Calcutta: Oxford & IBH, 1968.
MLA-viite (9. p.)Friedrich, Carl J. Constitutional Government and Democracy: Theory and Practice in Europe and America. 4th ed. Oxford & IBH, 1968.
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