Não informado. (2003). Cooperative plant pest report. U.S. Department of Agriculture, Animal and Plant Health Inspection Service.
Citação do estilo Chicago (17ª ed.)Não informado. Cooperative Plant Pest Report. Hyattsville, Md: U.S. Department of Agriculture, Animal and Plant Health Inspection Service, 2003.
Citação MLA (8ª ed.)Não informado. Cooperative Plant Pest Report. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.