Não informado. (1919). Memoirs of the Botanical Survey of South Africa. Department of Agricultural Technical Services, Botanical Research.
Lua i Stíl Chicago (17ú heag.)Não informado. Memoirs of the Botanical Survey of South Africa. Pretoria, Africa do Sul: Department of Agricultural Technical Services, Botanical Research, 1919.
Lua MLA (8ú heag.)Não informado. Memoirs of the Botanical Survey of South Africa. Department of Agricultural Technical Services, Botanical Research, 1919.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.