Estrin, S. Microeconomics (6.). Pearson Education UK.
Cita Chicago (17th ed.)Estrin, Saul;Dietrich. Microeconomics. 6. Pearson Education UK.
Cita MLA (8th ed.)Estrin, Saul;Dietrich. Microeconomics. 6. Pearson Education UK.
Atenció: Aquestes cites poden no estar 100% correctes.