Heyne, P. (1997). The economic way of thinking (8th ed.). Prentice Hall.
Cita Chicago (17th ed.)Heyne, Paul. The Economic Way of Thinking. 8th ed. New Jersey: Prentice Hall, 1997.
Cita MLA (9th ed.)Heyne, Paul. The Economic Way of Thinking. 8th ed. Prentice Hall, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.