Não informado. South African cancer bulletin. National Cancer Association of South Africa.
Chicago-viite (17. p.)Não informado. South African Cancer Bulletin. Johannesburg, Africa do Sul: National Cancer Association of South Africa.
MLA-viite (8. p.)Não informado. South African Cancer Bulletin. National Cancer Association of South Africa.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.