Não informado. (1950). Forest Resource Report. U.S. Department of Agriculture, Forest Service.
Chicago-Zitierstil (17. Ausg.)Não informado. Forest Resource Report. Washington: U.S. Department of Agriculture, Forest Service, 1950.
MLA-Zitierstil (8. Ausg.)Não informado. Forest Resource Report. U.S. Department of Agriculture, Forest Service, 1950.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.