Não informado. (1976). Quick bibliography series. National Agricultural Library, Department of Agriculture.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Quick Bibliography Series. Beltsville, Md: National Agricultural Library, Department of Agriculture, 1976.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Quick Bibliography Series. National Agricultural Library, Department of Agriculture, 1976.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.