Não informado. Annual report of the forest insect and disease survey. Department of Forestry and Rural Development, Forest Entomology and Pathology Branch.
Chicago-viite (17. p.)Não informado. Annual Report of the Forest Insect and Disease Survey. Ottawa: Department of Forestry and Rural Development, Forest Entomology and Pathology Branch.
MLA-viite (8. p.)Não informado. Annual Report of the Forest Insect and Disease Survey. Department of Forestry and Rural Development, Forest Entomology and Pathology Branch.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.