tinbergen, j. (1963). the appraisal of investment project. National Planning Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रtinbergen, j. The Appraisal of Investment Project. cairo: National Planning Institute, 1963.
एमएलए (9वां संस्करण) प्रशस्ति पत्रtinbergen, j. The Appraisal of Investment Project. National Planning Institute, 1963.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.