Bjornstad, D. J., & Kahn, J. R. (1996). The Contingent valuation of environmental resources: Methodological issues and research needs. Edward Elgar Publishing Limited.
Citace podle Chicago (17th ed.)Bjornstad, David J., a James R. Kahn. The Contingent Valuation of Environmental Resources: Methodological Issues and Research Needs. Cheltenham, United Kingdom: Edward Elgar Publishing Limited, 1996.
Citace podle MLA (9th ed.)Bjornstad, David J., a James R. Kahn. The Contingent Valuation of Environmental Resources: Methodological Issues and Research Needs. Edward Elgar Publishing Limited, 1996.
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