Nicolay, J. G. 1., Hay, J., & Angle, P. M. 1. (1966). Abraham Lincoln: A history ([Abridged ed.].). Chicago: University of Chicago Press.

Nicolay, John G. 1832-1901., John Hay, and Paul M. 1900-1975 Angle. Abraham Lincoln: A History. [Abridged ed.]. Chicago: University of Chicago Press, 1966.

Nicolay, John G. 1832-1901., John Hay, and Paul M. 1900-1975 Angle. Abraham Lincoln: A History. [Abridged ed.]. Chicago: University of Chicago Press, 1966.