World Conservation Monitoring Centre, International Union for Conservation of Nature and Natural Resources. Species Survival Commission, & International Council for Bird Preservation. (1990). 1990 IUCN red list of threatened animals. IUCN.
Chicago Style (17th ed.) CitationWorld Conservation Monitoring Centre, International Union for Conservation of Nature and Natural Resources. Species Survival Commission, and International Council for Bird Preservation. 1990 IUCN Red List of Threatened Animals. Gland, Switzerland ; Cambridge: IUCN, 1990.
MLA (9th ed.) CitationWorld Conservation Monitoring Centre, et al. 1990 IUCN Red List of Threatened Animals. IUCN, 1990.
Warning: These citations may not always be 100% accurate.