ebrary, Inc, Burlingame, M., Hay, J., & Nicolay, J. G. (2007). Abraham Lincoln: The observations of John G. Nicolay and John Hay. Southern Illinois University Press.
Style de citation Chicago (17e éd.)ebrary, Inc, Michael Burlingame, John Hay, et John G. Nicolay. Abraham Lincoln: The Observations of John G. Nicolay and John Hay. Carbondale: Southern Illinois University Press, 2007.
Style de citation MLA (9e éd.)ebrary, Inc, et al. Abraham Lincoln: The Observations of John G. Nicolay and John Hay. Southern Illinois University Press, 2007.
Attention : ces citations peuvent ne pas être correctes à 100%.