Não informado. (1903). South African Journal of Science. Associated Scientific & Technical Societies of South Africa.
Citação do estilo Chicago (17ª ed.)Não informado. South African Journal of Science. Johannesburg, Africa do Sul: Associated Scientific & Technical Societies of South Africa, 1903.
Citação MLA (8ª ed.)Não informado. South African Journal of Science. Associated Scientific & Technical Societies of South Africa, 1903.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.