Não informado. (1955). Forest pest leaflet. U.S. Department of Agriculture, Forest Service.
Chicago-Zitierstil (17. Ausg.)Não informado. Forest Pest Leaflet. Washington: U.S. Department of Agriculture, Forest Service, 1955.
MLA-Zitierstil (8. Ausg.)Não informado. Forest Pest Leaflet. U.S. Department of Agriculture, Forest Service, 1955.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.