Levitan, S. A., & Wurzburg, G. K. (1979). Evaluating Federal social programs: An uncertain art. W.E. Upjohn Institute for Employment Research.
Chicagoスタイル(17版)引用形式Levitan, Sar A., , Gregory K. Wurzburg. Evaluating Federal Social Programs: An Uncertain Art. Kalamazoo, Mich: W.E. Upjohn Institute for Employment Research, 1979.
MLA(9版)引用形式Levitan, Sar A., , Gregory K. Wurzburg. Evaluating Federal Social Programs: An Uncertain Art. W.E. Upjohn Institute for Employment Research, 1979.
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