Não informado. (1969). Journal of the American Society for Horticultural Science. American Society for Horticultural Science.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the American Society for Horticultural Science. Alexandria, Va: American Society for Horticultural Science, 1969.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the American Society for Horticultural Science. American Society for Horticultural Science, 1969.
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