Não informado. (2008). Transactions of the Sapporo Natural History Society. Sapporo Natural History Society.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Transactions of the Sapporo Natural History Society. Sapporo, Japão: Sapporo Natural History Society, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Transactions of the Sapporo Natural History Society. Sapporo Natural History Society, 2008.
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