Não informado. (1955). Forest pest leaflet. U.S. Department of Agriculture, Forest Service.
Style de citation Chicago (17e éd.)Não informado. Forest Pest Leaflet. Washington: U.S. Department of Agriculture, Forest Service, 1955.
Style de citation MLA (8e éd.)Não informado. Forest Pest Leaflet. U.S. Department of Agriculture, Forest Service, 1955.
Attention : ces citations peuvent ne pas être correctes à 100%.