Não informado. (2003). Cooperative plant pest report. U.S. Department of Agriculture, Animal and Plant Health Inspection Service.
Chicago-referens (17:e uppl.)Não informado. Cooperative Plant Pest Report. Hyattsville, Md: U.S. Department of Agriculture, Animal and Plant Health Inspection Service, 2003.
MLA-referens (8:e uppl.)Não informado. Cooperative Plant Pest Report. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, 2003.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.