Statistical Journal of the United Nations Economic Commission for Europe. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStatistical Journal of the United Nations Economic Commission for Europe. Cambridge University Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रStatistical Journal of the United Nations Economic Commission for Europe. Cambridge University Press.
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