Guell, R. C. (2010). Issues in Economics Today. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGuell, Robert C. Issues in Economics Today. McGraw-Hill, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGuell, Robert C. Issues in Economics Today. McGraw-Hill, 2010.
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