APA-Zitierstil (7. Ausg.)

(2007). Abraham Lincoln: The observations of John G. Nicolay and John Hay. Southern Illinois University Press.

Chicago-Zitierstil (17. Ausg.)

Abraham Lincoln: The Observations of John G. Nicolay and John Hay. Carbondale: Southern Illinois University Press, 2007.

MLA-Zitierstil (9. Ausg.)

Abraham Lincoln: The Observations of John G. Nicolay and John Hay. Southern Illinois University Press, 2007.