Não informado. (1951). Increasing understanding of public problems and policies. Farm Foundation.
Chicago-referens (17:e uppl.)Não informado. Increasing Understanding of Public Problems and Policies. Chicago, Ill: Farm Foundation, 1951.
MLA-referens (8:e uppl.)Não informado. Increasing Understanding of Public Problems and Policies. Farm Foundation, 1951.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.