Não informado. South African journal of medical sciences. University of the Witwatersrand, Medical Graduate Association.
Čikaški stil citiranja (17. izdanje)Não informado. South African Journal of Medical Sciences. Johannesburg, Africa do Sul: University of the Witwatersrand, Medical Graduate Association.
MLA način citiranja (8. izdanje)Não informado. South African Journal of Medical Sciences. University of the Witwatersrand, Medical Graduate Association.
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