Style de citation APA (7e éd.)
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%.