Não informado. (1925). Bulletin of the Kobe Imperial Marine Observatory. Kobe Imperial Marine Observatory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the Kobe Imperial Marine Observatory. Kobe, Japão: Kobe Imperial Marine Observatory, 1925.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the Kobe Imperial Marine Observatory. Kobe Imperial Marine Observatory, 1925.
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