Sky, T. (2011). The National Road and the difficult path to sustainable national investment. University of Delaware Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSky, Theodore. The National Road and the Difficult Path to Sustainable National Investment. Newark: University of Delaware Press, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSky, Theodore. The National Road and the Difficult Path to Sustainable National Investment. University of Delaware Press, 2011.
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