APA aipamena

American Gastroenterological Association. Gastroenterology: Gastroenterology. Baltimore: W.B. Saunders.

Chicago Style aipamena

American Gastroenterological Association. Gastroenterology: Gastroenterology. Baltimore: W.B. Saunders.

MLA aipamena

American Gastroenterological Association. Gastroenterology: Gastroenterology. Baltimore: W.B. Saunders.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.