Não informado. (1920). Journal of the Department of Agriculture of the Union of South Africa. Union of South Africa, Department of Agriculture.
Chicago-Zitierstil (17. Ausg.)Não 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.
MLA-Zitierstil (8. Ausg.)Não informado. Journal of the Department of Agriculture of the Union of South Africa. Union of South Africa, Department of Agriculture, 1920.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.