Não informado. (1977). South African journal of chemistry. Foundation for Education, Science and Technology.
Citação do estilo Chicago (17ª ed.)Não informado. South African Journal of Chemistry. Pretoria, Africa do Sul: Foundation for Education, Science and Technology, 1977.
Citação MLA (8ª ed.)Não informado. South African Journal of Chemistry. Foundation for Education, Science and Technology, 1977.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.