Widmer, E. L. (2020). Lincoln on the verge: Thirteen days to Washington (First Simon & Schuster hardcover edition.). Simon & Schuster.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWidmer, Edward L. Lincoln on the Verge: Thirteen Days to Washington. First Simon & Schuster hardcover edition. New York: Simon & Schuster, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWidmer, Edward L. Lincoln on the Verge: Thirteen Days to Washington. First Simon & Schuster hardcover edition. Simon & Schuster, 2020.
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