Papers of the Abraham Lincoln Association. University of Illinois Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPapers of the Abraham Lincoln Association. University of Illinois Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPapers of the Abraham Lincoln Association. University of Illinois Press.
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