Não informado. (2001). National health insurance. Medical Research Committe.
Chicago-referens (17:e uppl.)Não informado. National Health Insurance. London: Medical Research Committe, 2001.
MLA-referens (8:e uppl.)Não informado. National Health Insurance. Medical Research Committe, 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.