Buchanan, J. M., & Tullock, G. (1999). The calculus of consent: Logical foundations of constitutional democracy. Liberty Fund.
Lua i Stíl Chicago (17ú heag.)Buchanan, James M., agus Gordon Tullock. The Calculus of Consent: Logical Foundations of Constitutional Democracy. Indianapolis: Liberty Fund, 1999.
Lua MLA (8ú heag.)Buchanan, James M., agus Gordon Tullock. The Calculus of Consent: Logical Foundations of Constitutional Democracy. Liberty Fund, 1999.
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