Não informado. (2012). Quarterly Bulletin of Northwestern University Medical School. Northwestern University Medical School.
Chicago-referens (17:e uppl.)Não informado. Quarterly Bulletin of Northwestern University Medical School. Chicago, Ill: Northwestern University Medical School, 2012.
MLA-referens (8:e uppl.)Não informado. Quarterly Bulletin of Northwestern University Medical School. Northwestern University Medical School, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.