linsel, h., & sack, k. (1965). theoretical problems of investment planning. National Planning Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रlinsel, hermann, और kurt sack. Theoretical Problems of Investment Planning. cairo: National Planning Institute, 1965.
एमएलए (9वां संस्करण) प्रशस्ति पत्रlinsel, hermann, और kurt sack. Theoretical Problems of Investment Planning. National Planning Institute, 1965.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.