Não informado. Science serves your farm and home. West Virginia Agricultural Experiment Station.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Science Serves Your Farm and Home. Morgantown, Wa. Va: West Virginia Agricultural Experiment Station.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Science Serves Your Farm and Home. West Virginia Agricultural Experiment Station.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.