Não informado. (2001). Annual report of the forest insect survey. Department of Agriculture, Division of Entomology.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Annual Report of the Forest Insect Survey. Ottawa: Department of Agriculture, Division of Entomology, 2001.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Annual Report of the Forest Insect Survey. Department of Agriculture, Division of Entomology, 2001.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.