Economic research. Division of Business and Economic Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEconomic Research. New Orleans, LA: Division of Business and Economic Research.
एमएलए (9वां संस्करण) प्रशस्ति पत्रEconomic Research. Division of Business and Economic Research.
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