Não informado. (1951). Increasing understanding of public problems and policies. Farm Foundation.
Chicagoスタイル(17版)引用形式Não informado. Increasing Understanding of Public Problems and Policies. Chicago, Ill: Farm Foundation, 1951.
MLA(8版)引用形式Não informado. Increasing Understanding of Public Problems and Policies. Farm Foundation, 1951.
警告: この引用は必ずしも正確ではありません.