Buchanan, J. M., & Tullock, G. (1999). The calculus of consent: Logical foundations of constitutional democracy. Liberty Fund.
Chicago-viite (17. p.)Buchanan, James M., ja Gordon Tullock. The Calculus of Consent: Logical Foundations of Constitutional Democracy. Indianapolis: Liberty Fund, 1999.
MLA-viite (8. p.)Buchanan, James M., ja Gordon Tullock. The Calculus of Consent: Logical Foundations of Constitutional Democracy. Liberty Fund, 1999.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.