Não informado. (2020). USDA Forest Service Resource Bulletin INT. US Department of Agriculture, Intermountain Forest and Range Experiment Station.
Chicago-Zitierstil (17. Ausg.)Não informado. USDA Forest Service Resource Bulletin INT. Ogden, Utah: US Department of Agriculture, Intermountain Forest and Range Experiment Station, 2020.
MLA-Zitierstil (8. Ausg.)Não informado. USDA Forest Service Resource Bulletin INT. US Department of Agriculture, Intermountain Forest and Range Experiment Station, 2020.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.