Lua APA (7ú heag.)
ebrary, Inc. (2005). How much is an ecosystem worth?: Assessing the economic value of conservation. IUCN, the Nature Conservancy, the World Bank.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc. How Much Is an Ecosystem Worth?: Assessing the Economic Value of Conservation. Washington, DC: IUCN, the Nature Conservancy, the World Bank, 2005.
Lua MLA (9ú heag.)
ebrary, Inc. How Much Is an Ecosystem Worth?: Assessing the Economic Value of Conservation. IUCN, the Nature Conservancy, the World Bank, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.