Não informado. (1978). Rural Development Perspectives. U.S. Department of Agriculture, Economics, Statistics and Cooperative Service.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Rural Development Perspectives. Washington: U.S. Department of Agriculture, Economics, Statistics and Cooperative Service, 1978.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Rural Development Perspectives. U.S. Department of Agriculture, Economics, Statistics and Cooperative Service, 1978.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.