Não informado. (1976). Africa Development. Council for the Development of Economic and Social Research in Africa.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Africa Development. Dakar: Council for the Development of Economic and Social Research in Africa, 1976.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Africa Development. Council for the Development of Economic and Social Research in Africa, 1976.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.