Não informado. Sunflower newsletter. International Sunflower Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Sunflower Newsletter. Amsterdam: International Sunflower Association.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Sunflower Newsletter. International Sunflower Association.
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