Não informado. (1965). Journal of the Nigerian Institute for Oil Palm Research. Nigerian Institute for Oil Palm Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Nigerian Institute for Oil Palm Research. Benin City, Nigeria: Nigerian Institute for Oil Palm Research, 1965.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Nigerian Institute for Oil Palm Research. Nigerian Institute for Oil Palm Research, 1965.
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