Não informado. (1968). Rhodesian journal of agricultural research. Department of Research and Specialist Services.
Citação do estilo Chicago (17ª ed.)Não informado. Rhodesian Journal of Agricultural Research. Salisbury, Zimbabwe: Department of Research and Specialist Services, 1968.
Citação MLA (8ª ed.)Não informado. Rhodesian Journal of Agricultural Research. Department of Research and Specialist Services, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.