Não informado. (1911). South African bee journal. South African Federation of Beefarmers Associations.
Chicago-referens (17:e uppl.)Não informado. South African Bee Journal. Modderfontein, Africa do Sul: South African Federation of Beefarmers Associations, 1911.
MLA-referens (8:e uppl.)Não informado. South African Bee Journal. South African Federation of Beefarmers Associations, 1911.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.