Não informado. (2000). Bulletin of the West Virginia University Agricultural Experiment Station. West Virginia Agricultural Experiment Station.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Bulletin of the West Virginia University Agricultural Experiment Station. Morgantown, Va: West Virginia Agricultural Experiment Station, 2000.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Bulletin of the West Virginia University Agricultural Experiment Station. West Virginia Agricultural Experiment Station, 2000.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.