Não informado. (1976). Journal of the Rubber Research Institute of Sri Lanka. Rubber Research Institute of Sri Lanka.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Rubber Research Institute of Sri Lanka. Agalawatta, Sri Lanka: Rubber Research Institute of Sri Lanka, 1976.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Rubber Research Institute of Sri Lanka. Rubber Research Institute of Sri Lanka, 1976.
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