Não informado. (2003). Current Opinion in Gastroenterology. Gower Academic Journals.
Chicago-referens (17:e uppl.)Não informado. Current Opinion in Gastroenterology. New York: Gower Academic Journals, 2003.
MLA-referens (8:e uppl.)Não informado. Current Opinion in Gastroenterology. Gower Academic Journals, 2003.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.