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শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited States. Department of Agriculture. Economic Research Service. Agricultural Resources and Environmental Indicators. Washington, DC: The Service, 1994.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিUnited States. Department of Agriculture. Economic Research Service. Agricultural Resources and Environmental Indicators. The Service, 1994.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.