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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNations, United. The European Economy in 1972: Economic Survey of Europe in 1972. The author, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNations, United. The European Economy in 1972: Economic Survey of Europe in 1972. The author, 1973.
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