Não informado. (1918). Journal of the College of Agriculture. Hokkaido Imperial University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the College of Agriculture. Sapporo, Japão: Hokkaido Imperial University, 1918.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the College of Agriculture. Hokkaido Imperial University, 1918.
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