Albert O. Hirschman. The Passions and the Interests. Princeton, N. J.: Princeton University Press, 1977. P. 32, 73, 132–133.
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Remarks by the president on August 15, 2011; “Teachers Paid on Par with Doctors?” August 19, 2011, http://factcheck.org; Barack Obama. The Audacity of Hope. New York: Three Rivers Press, 2006. P. 62.
