(2008). Willingness to pay for the conservation of endangered species in four Asian countries. Singapore: Economy and Enviroment program for Southest Asia.
Chicago-tyylinen lähdeviittausWillingness to Pay for the Conservation of Endangered Species in Four Asian Countries. Singapore: Economy and Enviroment program for Southest Asia, 2008.
MLA-viiteWillingness to Pay for the Conservation of Endangered Species in Four Asian Countries. Singapore: Economy and Enviroment program for Southest Asia, 2008.
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