Não informado. (1919). Memoirs of the Botanical Survey of South Africa. Department of Agricultural Technical Services, Botanical Research.
Citação do estilo Chicago (17ª ed.)Não informado. Memoirs of the Botanical Survey of South Africa. Pretoria, Africa do Sul: Department of Agricultural Technical Services, Botanical Research, 1919.
Citação MLA (8ª ed.)Não informado. Memoirs of the Botanical Survey of South Africa. Department of Agricultural Technical Services, Botanical Research, 1919.
警告：这些引文格式不一定是100％准确.