Não informado. (2018). Research Report. Virginia Agricultural Experiment Station, Virginia Polytechnic Institute.
Chicago-Zitierstil (17. Ausg.)Não informado. Research Report. Blacksburg, Va: Virginia Agricultural Experiment Station, Virginia Polytechnic Institute, 2018.
MLA-Zitierstil (8. Ausg.)Não informado. Research Report. Virginia Agricultural Experiment Station, Virginia Polytechnic Institute, 2018.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.