Cita APA (7a ed.)

Horn, K. H. (1967). Productivity , Concepts and Measurement. The Institute of National Planning.

Cita Chicago Style (17a ed.)

Horn, Karl Heinz. Productivity , Concepts and Measurement. Cairo: The Institute of National Planning, 1967.

Cita MLA (9a ed.)

Horn, Karl Heinz. Productivity , Concepts and Measurement. The Institute of National Planning, 1967.

Precaución: Estas citas no son 100% exactas.