Não informado. (1923). Canadian insect pest review. Department of Agriculture, Division of Entomology.
Chicago-referens (17:e uppl.)Não informado. Canadian Insect Pest Review. Ottawa: Department of Agriculture, Division of Entomology, 1923.
MLA-referens (8:e uppl.)Não informado. Canadian Insect Pest Review. Department of Agriculture, Division of Entomology, 1923.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.