Horn, K. H. (1967). Productivity , Concepts and Measurement. The Institute of National Planning.
Chicagoスタイル(17版)引用形式Horn, Karl Heinz. Productivity , Concepts and Measurement. Cairo: The Institute of National Planning, 1967.
MLA(9版)引用形式Horn, Karl Heinz. Productivity , Concepts and Measurement. The Institute of National Planning, 1967.
警告: この引用は必ずしも正確ではありません.