Não informado. (1961). Journal of the Mining College, Akita University. Akita Daigaku Kozangakubu.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Mining College, Akita University. Akita, Japão: Akita Daigaku Kozangakubu, 1961.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Mining College, Akita University. Akita Daigaku Kozangakubu, 1961.
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