Não informado. (1969). The Year book of neurology and neurosurgery. Year Book Medical Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Year Book of Neurology and Neurosurgery. Chicago, Ill: Year Book Medical Publishers, 1969.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Year Book of Neurology and Neurosurgery. Year Book Medical Publishers, 1969.
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