Não informado. (1919). Journal of the American Medical Association: Edicion en espanol. American Medical Association.
Chicago-referens (17:e uppl.)Não informado. Journal of the American Medical Association: Edicion En Espanol. Chicago, Ill: American Medical Association, 1919.
MLA-referens (8:e uppl.)Não informado. Journal of the American Medical Association: Edicion En Espanol. American Medical Association, 1919.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.