Lehmann, M. B. (1997). Real world economic applications: The Wall Street journal workbook (6th ed.). Irwin.
Cita Chicago (17th ed.)Lehmann, Michael B. Real World Economic Applications: The Wall Street Journal Workbook. 6th ed. Chicago: Irwin, 1997.
Cita MLA (8th ed.)Lehmann, Michael B. Real World Economic Applications: The Wall Street Journal Workbook. 6th ed. Irwin, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.