Não informado. (2000). Bulletin of the West Virginia University Agricultural Experiment Station. West Virginia Agricultural Experiment Station.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Bulletin of the West Virginia University Agricultural Experiment Station. Morgantown, Va: West Virginia Agricultural Experiment Station, 2000.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Bulletin of the West Virginia University Agricultural Experiment Station. West Virginia Agricultural Experiment Station, 2000.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.