Não informado. Picture Sheet. Bureau of Entomology and Plant Quarantine.
Chicago-referens (17:e uppl.)Não informado. Picture Sheet. Washington: Bureau of Entomology and Plant Quarantine.
MLA-referens (8:e uppl.)Não informado. Picture Sheet. Bureau of Entomology and Plant Quarantine.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.