Não informado. West Virginia Agriculture and Forestry. University of West Virginia, College of Agriculture and Forestry.
Chicago-Zitierstil (17. Ausg.)Não informado. West Virginia Agriculture and Forestry. Morgantown, Wa. Va: University of West Virginia, College of Agriculture and Forestry.
MLA-Zitierstil (8. Ausg.)Não informado. West Virginia Agriculture and Forestry. University of West Virginia, College of Agriculture and Forestry.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.