Não informado. South African cancer bulletin. National Cancer Association of South Africa.
Chicago (17e ed.) BronvermeldingNão informado. South African Cancer Bulletin. Johannesburg, Africa do Sul: National Cancer Association of South Africa.
MLA (8e ed.) BronvermeldingNão informado. South African Cancer Bulletin. National Cancer Association of South Africa.
Let op: Deze citaties zijn niet altijd 100% accuraat.