Não informado. (1970). Chest. American College of Chest Physicians.
Chicago-referens (17:e uppl.)Não informado. Chest. Park Ridge, Ill: American College of Chest Physicians, 1970.
MLA-referens (8:e uppl.)Não informado. Chest. American College of Chest Physicians, 1970.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.