Mitchell, R. C. (1989). Using surveys to value public goods: The contingent valuation method. Resources for the Future.
Chicago Style (17. basım) AtıfMitchell, Robert Cameron. Using Surveys to Value Public Goods: The Contingent Valuation Method. Washington: Resources for the Future, 1989.
MLA (9th ed.) AtıfMitchell, Robert Cameron. Using Surveys to Value Public Goods: The Contingent Valuation Method. Resources for the Future, 1989.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..