Não informado. Transvaal agricultural journal. Union of South Africa, Department of Agriculture.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Transvaal Agricultural Journal. Pretoria, Africa do Sul: Union of South Africa, Department of Agriculture.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Transvaal Agricultural Journal. Union of South Africa, Department of Agriculture.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.