Barber, J. D. (1964). Political leadership in american government. Little, Brown and Company.
Chicago-čujuhus (17. p.)Barber, James David. Political Leadership in American Government. Boston: Little, Brown and Company, 1964.
MLA-čujuhus (9. p.)Barber, James David. Political Leadership in American Government. Little, Brown and Company, 1964.
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