Não informado. (1968). Rhodesian journal of agricultural research. Department of Research and Specialist Services.
Chicago-referens (17:e uppl.)Não informado. Rhodesian Journal of Agricultural Research. Salisbury, Zimbabwe: Department of Research and Specialist Services, 1968.
MLA-referens (8:e uppl.)Não informado. Rhodesian Journal of Agricultural Research. Department of Research and Specialist Services, 1968.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.