Não informado. (1945). National Library of Medicine News. National Library of Medicine.
Chicago-referens (17:e uppl.)Não informado. National Library of Medicine News. Washington: National Library of Medicine, 1945.
MLA-referens (8:e uppl.)Não informado. National Library of Medicine News. National Library of Medicine, 1945.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.