International Political Science Association & Ehrmann, H. W. (1958). Interest groups on four continents: Ed. for the International Political Science Association. Pittsburgh U.P..
Citace podle Chicago (17th ed.)International Political Science Association a Henry W. Ehrmann. Interest Groups on Four Continents: Ed. for the International Political Science Association. Pittsburgh: Pittsburgh U.P., 1958.
Citace podle MLA (8th ed.)International Political Science Association a Henry W. Ehrmann. Interest Groups on Four Continents: Ed. for the International Political Science Association. Pittsburgh U.P., 1958.
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