Não informado. (1951). Increasing understanding of public problems and policies. Farm Foundation.
Chicago-Zitierstil (17. Ausg.)Não informado. Increasing Understanding of Public Problems and Policies. Chicago, Ill: Farm Foundation, 1951.
MLA-Zitierstil (8. Ausg.)Não informado. Increasing Understanding of Public Problems and Policies. Farm Foundation, 1951.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.