Hiltzik, M. A. (2020). Iron empires: Robber barons, railroads, and the making of modern America. Houghton Mifflin Harcourt.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHiltzik, Michael A. Iron Empires: Robber Barons, Railroads, and the Making of Modern America. Boston: Houghton Mifflin Harcourt, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHiltzik, Michael A. Iron Empires: Robber Barons, Railroads, and the Making of Modern America. Houghton Mifflin Harcourt, 2020.
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