Παραπομπή σε μορφή APA (7η εκδ.)

Whitehead, J. C. Willingness to pay for quality improvements: Comparative statics and interpretation of contingent valuation results. Land economics..

Παραπομπή σε μορφή Chicago (17η εκδ.)

Whitehead, John C. "Willingness to Pay for Quality Improvements: Comparative Statics and Interpretation of Contingent Valuation Results." Land Economics. .

Παραπομπή σε μορφή MLA (9th εκδ.)

Whitehead, John C. "Willingness to Pay for Quality Improvements: Comparative Statics and Interpretation of Contingent Valuation Results." Land Economics., .