Não informado. (1984). Year book of digestive diseases. Year Book Medical Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Year Book of Digestive Diseases. Chicago, Ill: Year Book Medical Publishers, 1984.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Year Book of Digestive Diseases. Year Book Medical Publishers, 1984.
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