Não informado. (1941). Crop Production. Department of Agriculture, Statistical Reporting Service.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Crop Production. Washington: Department of Agriculture, Statistical Reporting Service, 1941.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Crop Production. Department of Agriculture, Statistical Reporting Service, 1941.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.