Não informado. (1950). American Journal of Proctology. International Academy of Proctology.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. American Journal of Proctology. New York: International Academy of Proctology, 1950.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. American Journal of Proctology. International Academy of Proctology, 1950.
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