Não informado. (2008). Threatened Plants Newsletter. International Union for Conservation of Nature and Natural Resources.
Chicago-referens (17:e uppl.)Não informado. Threatened Plants Newsletter. Kew, Inglaterra: International Union for Conservation of Nature and Natural Resources, 2008.
MLA-referens (8:e uppl.)Não informado. Threatened Plants Newsletter. International Union for Conservation of Nature and Natural Resources, 2008.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.