Srein, Z. (1976). Planning the Volume of Investment the Long-run Period. The Institute of National Planning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSrein, Zdenek. Planning the Volume of Investment the Long-run Period. Cairo: The Institute of National Planning, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSrein, Zdenek. Planning the Volume of Investment the Long-run Period. The Institute of National Planning, 1976.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.