Não informado. (2001). Annual report of the forest insect survey. Department of Agriculture, Division of Entomology.
Citação do estilo Chicago (17ª ed.)Não informado. Annual Report of the Forest Insect Survey. Ottawa: Department of Agriculture, Division of Entomology, 2001.
Citação MLA (8ª ed.)Não informado. Annual Report of the Forest Insect Survey. Department of Agriculture, Division of Entomology, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.