Não informado. (2001). Studies from the Douglas Smith Foundation for Medical Research of the University of Chicago. University of Chicago.
Chicago-referens (17:e uppl.)Não informado. Studies from the Douglas Smith Foundation for Medical Research of the University of Chicago. Chicago, Ill: University of Chicago, 2001.
MLA-referens (8:e uppl.)Não informado. Studies from the Douglas Smith Foundation for Medical Research of the University of Chicago. University of Chicago, 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.