Knauthe, H. E. (1966). Prospective Planning and Investment Decisions: Economic Problems Concerned with Preparation and Carrying out of Investments. The institute of national planning.
Cita Chicago (17th ed.)Knauthe, Habil Erhart. Prospective Planning and Investment Decisions: Economic Problems Concerned with Preparation and Carrying Out of Investments. Cairo: The institute of national planning, 1966.
Cita MLA (9th ed.)Knauthe, Habil Erhart. Prospective Planning and Investment Decisions: Economic Problems Concerned with Preparation and Carrying Out of Investments. The institute of national planning, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.