APA
World Resources Institute (WRI), The World conservation Union (IUCN) & United Nations Environment Programme (UNEP). (1992). Global biodiversity strategy. Washington: World Resources Institute.
Chicago
World Resources Institute (WRI), The World conservation Union (IUCN) and United Nations Environment Programme (UNEP). 1992. Global biodiversity strategy. Washington: World Resources Institute.
Harvard
World Resources Institute (WRI), The World conservation Union (IUCN) and United Nations Environment Programme (UNEP). (1992). Global biodiversity strategy. Washington: World Resources Institute.
MLA
World Resources Institute (WRI), The World conservation Union (IUCN) and United Nations Environment Programme (UNEP). Global biodiversity strategy. Washington: World Resources Institute. 1992.