Não informado. South African journal of medical sciences. University of the Witwatersrand, Medical Graduate Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. South African Journal of Medical Sciences. Johannesburg, Africa do Sul: University of the Witwatersrand, Medical Graduate Association.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. South African Journal of Medical Sciences. University of the Witwatersrand, Medical Graduate Association.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.