Não informado. (1920). Journal of the Department of Agriculture of the Union of South Africa. Union of South Africa, Department of Agriculture.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Journal of the Department of Agriculture of the Union of South Africa. Pretoria, Africa do Sul: Union of South Africa, Department of Agriculture, 1920.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Journal of the Department of Agriculture of the Union of South Africa. Union of South Africa, Department of Agriculture, 1920.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.