Não informado. (2022). USDA Forest Service Resource Bulletin PNW. Pacific Northwest Forest and Range Experiment Station.
Citação do estilo Chicago (17ª ed.)Não informado. USDA Forest Service Resource Bulletin PNW. Portland, Ore: Pacific Northwest Forest and Range Experiment Station, 2022.
Citação MLA (8ª ed.)Não informado. USDA Forest Service Resource Bulletin PNW. Pacific Northwest Forest and Range Experiment Station, 2022.
Atenció: Aquestes cites poden no estar 100% correctes.