^ "Religious Quotations by Abraham Lincoln". www.abrahamlincolnonline.org. Retrieved March 14, 2020.

^ Donald 1996, pp. 48–49.

^ Parrillo 2000, pp. 227–253.

^ White 2009, p. 180.

^ Brodrecht, Grant R. (2008). "Our Country": Northern Evangelicals and the Union During the Civil War and Reconstruction. University of Notre Dame.

^ Wilson 1999, pp. 251–254.

^ Wilson 1999, p. 254.

^ "Letter by Abraham Lincoln to Albert Hodges". www.abrahamlincolnonline.org. Retrieved March 14, 2020.

^ Wills, Garry (September 1, 1999). "Lincoln's Greatest Speech". The Atlantic. Retrieved March 14, 2020.; White Jr., Ronald C., Lincoln's Greatest Speech: The Second Inaugural, New York: Simon & Schuster, 2002.

^ Lincoln, Abraham (2001) [1953]. Collected Works of Abraham Lincoln. Volume 8.

^ "Inaugural Addresses of the Presidents of the United States: from George Washington 1789 to George Bush 1989". avalon.law.yale.edu. Retrieved March 14, 2020.

^ Carwardine 2003, pp. 27–55.

^ Guelzo 1999, p. 434.

^ "What Can Lincoln's DNA Tell Us?". February 13, 2009. Retrieved February 20, 2020.

^ Hirschhorn, Norbert; Feldman, Robert G.; Greaves, Ian (Summer 2001). "Abraham Lincoln's Blue Pills: Did Our 16th President Suffer from Mercury Poisoning?". Perspectives in Biology and Medicine. Johns Hopkins University Press. 44 (3): 315–322. doi:10.1353/pbm.2001.0048. PMID 11482002. S2CID 37918186. 