Não informado. (2003). Current Opinion in Gastroenterology. Gower Academic Journals.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Current Opinion in Gastroenterology. New York: Gower Academic Journals, 2003.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Current Opinion in Gastroenterology. Gower Academic Journals, 2003.
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