Nicolay, J. G., Hay, J., & Burlingame, M. (2007). Abraham Lincoln: The Observations of John G. Nicolay and John Hay. Southern Illinois University Press.
Chicago Style (17th ed.) CitationNicolay, John G., John Hay, and Michael Burlingame. Abraham Lincoln: The Observations of John G. Nicolay and John Hay. Carbondale: Southern Illinois University Press, 2007.
MLA (8th ed.) CitationNicolay, John G., et al. Abraham Lincoln: The Observations of John G. Nicolay and John Hay. Southern Illinois University Press, 2007.
Warning: These citations may not always be 100% accurate.