Não informado. (1938). Journal of the South African Forestry Association. South African Forestry Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the South African Forestry Association. Pretoria, Africa do Sul: South African Forestry Association, 1938.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the South African Forestry Association. South African Forestry Association, 1938.
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