Não informado. South African cancer bulletin. National Cancer Association of South Africa.
Chicago-referens (17:e uppl.)Não informado. South African Cancer Bulletin. Johannesburg, Africa do Sul: National Cancer Association of South Africa.
MLA-referens (8:e uppl.)Não informado. South African Cancer Bulletin. National Cancer Association of South Africa.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.