Não informado. (2003). Chest. American College of Chest Physicians.
Chicago-referens (17:e uppl.)Não informado. Chest. Chicago, Ill: American College of Chest Physicians, 2003.
MLA-referens (8:e uppl.)Não informado. Chest. American College of Chest Physicians, 2003.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.