Não informado. Publications of the International Health Board. Rockefeller Foundation.
Chicago-referens (17:e uppl.)Não informado. Publications of the International Health Board. New York: Rockefeller Foundation.
MLA-referens (8:e uppl.)Não informado. Publications of the International Health Board. Rockefeller Foundation.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.