Mitchell, R. C. (1989). Using surveys to value public goods: The contingent valuation method. Resources for the Future.
Cita Chicago Style (17a ed.)Mitchell, Robert Cameron. Using Surveys to Value Public Goods: The Contingent Valuation Method. Washington: Resources for the Future, 1989.
Cita MLA (9a ed.)Mitchell, Robert Cameron. Using Surveys to Value Public Goods: The Contingent Valuation Method. Resources for the Future, 1989.
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