Não informado. (2001). South African journal of plant and soil. Foundation for Education, Science and Technology.
Cita Chicago Style (17a ed.)Não informado. South African Journal of Plant and Soil. Pretoria, Africa do Sul: Foundation for Education, Science and Technology, 2001.
Cita MLA (8a ed.)Não informado. South African Journal of Plant and Soil. Foundation for Education, Science and Technology, 2001.
Precaución: Estas citas no son 100% exactas.