Não informado. (1982). International health news. National Council for International Health.
Chicago-referens (17:e uppl.)Não informado. International Health News. Washington: National Council for International Health, 1982.
MLA-referens (8:e uppl.)Não informado. International Health News. National Council for International Health, 1982.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.