Não informado. South African journal of medical sciences. University of the Witwatersrand, Medical Graduate Association.
Citação do estilo Chicago (17ª ed.)Não informado. South African Journal of Medical Sciences. Johannesburg, Africa do Sul: University of the Witwatersrand, Medical Graduate Association.
Citação MLA (8ª ed.)Não informado. South African Journal of Medical Sciences. University of the Witwatersrand, Medical Graduate Association.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.