Não informado. (1932). Report and accounts of the National Botanic Gardens of South Africa. National Botanic Gardens of South Africa.
Lua i Stíl Chicago (17ú heag.)Não informado. Report and Accounts of the National Botanic Gardens of South Africa. Cape Town, Africa do Sul: National Botanic Gardens of South Africa, 1932.
Lua MLA (8ú heag.)Não informado. Report and Accounts of the National Botanic Gardens of South Africa. National Botanic Gardens of South Africa, 1932.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.