Zall. Lincoln Looks West. Southern Illinois University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रZall. Lincoln Looks West. Southern Illinois University Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रZall. Lincoln Looks West. Southern Illinois University Press.
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