APA (7e ed.) Bronvermelding
ebrary, Inc. (2005). How much is an ecosystem worth?: Assessing the economic value of conservation. IUCN, the Nature Conservancy, the World Bank.
Chicago (17e ed.) Bronvermelding
ebrary, Inc. How Much Is an Ecosystem Worth?: Assessing the Economic Value of Conservation. Washington, DC: IUCN, the Nature Conservancy, the World Bank, 2005.
MLA (9e ed.) Bronvermelding
ebrary, Inc. How Much Is an Ecosystem Worth?: Assessing the Economic Value of Conservation. IUCN, the Nature Conservancy, the World Bank, 2005.
Let op: Deze citaties zijn niet altijd 100% accuraat.