Não informado. (2001). South African journal of plant and soil. Foundation for Education, Science and Technology.
Chicago-Zitierstil (17. Ausg.)Não informado. South African Journal of Plant and Soil. Pretoria, Africa do Sul: Foundation for Education, Science and Technology, 2001.
MLA-Zitierstil (8. Ausg.)Não informado. South African Journal of Plant and Soil. Foundation for Education, Science and Technology, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.