Hausman, J. (1993). Contingent Valuation. ELSEVIER.
Cita Chicago (17th ed.)Hausman, J.A. Contingent Valuation. ELSEVIER, 1993.
Cita MLA (8th ed.)Hausman, J.A. Contingent Valuation. ELSEVIER, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.