tinbergen, j. (1963). the appraisal of investment project. National Planning Institute.
Cita Chicago (17th ed.)tinbergen, j. The Appraisal of Investment Project. cairo: National Planning Institute, 1963.
Cita MLA (9th ed.)tinbergen, j. The Appraisal of Investment Project. National Planning Institute, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.