Hatzenbuehler. Jefferson, Lincoln, and the Unfinished Work of the Nation. Southern Illinois University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHatzenbuehler. Jefferson, Lincoln, and the Unfinished Work of the Nation. Southern Illinois University Press.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHatzenbuehler. Jefferson, Lincoln, and the Unfinished Work of the Nation. Southern Illinois University Press.
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