Tim harford. (2017). Fifty Things That Made the Modern Economy. Little Brown.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTim harford. Fifty Things That Made the Modern Economy. UK: Little Brown, 2017.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTim harford. Fifty Things That Made the Modern Economy. Little Brown, 2017.
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