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.
警告：这些引文格式不一定是100％准确.