Ambrose, S. E. (1996). Halleck, Lincoln's Chief of Staff (Louisiana paperback ed.). Louisiana State University Press.

Ambrose, Stephen E. Halleck, Lincoln's Chief of Staff. Louisiana paperback ed. Baton Rouge: Louisiana State University Press, 1996.

Ambrose, Stephen E. Halleck, Lincoln's Chief of Staff. Louisiana paperback ed. Louisiana State University Press, 1996.