Schmidt, S. W., & Shelley, M. C. (1991). American government and politics today. West.
Chicago-čujuhus (17. p.)Schmidt, Steffen W., juo Mack C. Shelley. American Government and Politics Today. Saint Paul: West, 1991.
MLA-čujuhus (9. p.)Schmidt, Steffen W., juo Mack C. Shelley. American Government and Politics Today. West, 1991.
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