Não informado. (1971). South African journal of animal science. South African Society of Animal Production.
Chicago-referens (17:e uppl.)Não informado. South African Journal of Animal Science. Pretoria, Africa do Sul: South African Society of Animal Production, 1971.
MLA-referens (8:e uppl.)Não informado. South African Journal of Animal Science. South African Society of Animal Production, 1971.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.