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Lua i Stíl Chicago (17ú heag.)Association of Environmental and Resource Economists. Journal of Environmental Economics and Management. New York: Academic Press, 1974.
Lua MLA (8ú heag.)Association of Environmental and Resource Economists. Journal of Environmental Economics and Management. Academic Press, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.