Não informado. (1915). Journal of the Botanical Society of South Africa. Botanical Society of South Africa.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Botanical Society of South Africa. Cape Town, Africa do Sul: Botanical Society of South Africa, 1915.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Botanical Society of South Africa. Botanical Society of South Africa, 1915.
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