Heyne, P. T. (2000). The economic way of thinking (9th ed.). Prentice Hall.
Cita Chicago (17th ed.)Heyne, Paul T. The Economic Way of Thinking. 9th ed. Upper Saddle River, NJ: Prentice Hall, 2000.
Cita MLA (9th ed.)Heyne, Paul T. The Economic Way of Thinking. 9th ed. Prentice Hall, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.