Não informado. (1932). Entomology. U.S. Department of Agriculture, Bureau of Entomology.
Chicago-referens (17:e uppl.)Não informado. Entomology. Washington: U.S. Department of Agriculture, Bureau of Entomology, 1932.
MLA-referens (8:e uppl.)Não informado. Entomology. U.S. Department of Agriculture, Bureau of Entomology, 1932.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.