Não informado. (1947). Economic Survey of Europe. United Nations, Department of Economic and Social Affairs.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Economic Survey of Europe. Geneve, Suíça: United Nations, Department of Economic and Social Affairs, 1947.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Economic Survey of Europe. United Nations, Department of Economic and Social Affairs, 1947.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.