Não informado. (2001). South African journal of plant and soil. Foundation for Education, Science and Technology.
Citação do estilo Chicago (17ª ed.)Não informado. South African Journal of Plant and Soil. Pretoria, Africa do Sul: Foundation for Education, Science and Technology, 2001.
Citação MLA (8ª ed.)Não informado. South African Journal of Plant and Soil. Foundation for Education, Science and Technology, 2001.
警告：这些引文格式不一定是100％准确.