Di Mana Gulma
Amerika Utara | Weed Science Society of America (2010) - Composite List of Weeds |
Amerika Selatan | Inter-American Biodiversity Information Network |
Kerajaan Inggris & Irlandia | Online Atlas of the British & Irish Flora |
Laut Mediteranea | CABI - Invasive Species Compendium |
Afrika Timur & Barat | Plants of the World Online |
Afrika Selatan | I.A.W. MacDonald (2003) - Invasive Alien Species in Southern Africa |
Asia Selatan | P.S. Negi & P.K. Hajra (2007) |
Australia | Australian Government - Weeds in Australia |
Selandia Baru | C. Howell (2008) - Consolidated List of Environmental Weeds in NZ |
Kepulauan Pasifik | Pacific Island Ecosystems at Risk (PIER) |