American College of Surgeons. (1991). Update on biliary tract disease. American College of Surgeons.
Chicago-referens (17:e uppl.)American College of Surgeons. Update on Biliary Tract Disease. New York: American College of Surgeons, 1991.
MLA-referens (9:e uppl.)American College of Surgeons. Update on Biliary Tract Disease. American College of Surgeons, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.