Não informado. Science serves your farm and home. West Virginia Agricultural Experiment Station.
Chicago-referens (17:e uppl.)Não informado. Science Serves Your Farm and Home. Morgantown, Wa. Va: West Virginia Agricultural Experiment Station.
MLA-referens (8:e uppl.)Não informado. Science Serves Your Farm and Home. West Virginia Agricultural Experiment Station.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.