Não informado. (1955). Forest pest leaflet. U.S. Department of Agriculture, Forest Service.
Lua i Stíl Chicago (17ú heag.)Não informado. Forest Pest Leaflet. Washington: U.S. Department of Agriculture, Forest Service, 1955.
Lua MLA (8ú heag.)Não informado. Forest Pest Leaflet. U.S. Department of Agriculture, Forest Service, 1955.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.