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Lua i Stíl Chicago (17ú heag.)Schuijt, Kirsten. Valuation of Water: The Process of Economic Valuation of Ecosystems in Water Management. 2003.
Lua MLA (8ú heag.)Schuijt, Kirsten. Valuation of Water: The Process of Economic Valuation of Ecosystems in Water Management. 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.