Não informado. (1947). Official Records of the World Health Organization. World Health Organization.
Chicago-referens (17:e uppl.)Não informado. Official Records of the World Health Organization. Geneva, Suíça: World Health Organization, 1947.
MLA-referens (8:e uppl.)Não informado. Official Records of the World Health Organization. World Health Organization, 1947.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.