Roche, J. P., & Levy, L. W. (1964). Parties and pressure groups. Harcourt, Brace & World.
Čikaški stil citiranja (17. izdanje)Roche, John Pearson, i Leonard Williams Levy. Parties and Pressure Groups. New York: Harcourt, Brace & World, 1964.
MLA način citiranja (9. izdanje)Roche, John Pearson, i Leonard Williams Levy. Parties and Pressure Groups. Harcourt, Brace & World, 1964.
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