Não informado. (1903). South African Journal of Science. Associated Scientific & Technical Societies of South Africa.
Chicago Style (17. basım) AtıfNão informado. South African Journal of Science. Johannesburg, Africa do Sul: Associated Scientific & Technical Societies of South Africa, 1903.
MLA (8th ed.) AtıfNão informado. South African Journal of Science. Associated Scientific & Technical Societies of South Africa, 1903.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..