APA-referens (7:e uppl.)

Não informado. (2001). South African journal of plant and soil. Foundation for Education, Science and Technology.

Chicago-referens (17:e uppl.)

Não informado. South African Journal of Plant and Soil. Pretoria, Africa do Sul: Foundation for Education, Science and Technology, 2001.

MLA-referens (8:e uppl.)

Não informado. South African Journal of Plant and Soil. Foundation for Education, Science and Technology, 2001.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.