Tolong jelaskan mengenai Konstitusional dan legal dari Persatuan Amerika

Hyman, Harold. A More Perfect Union: The Impact of the Civil War and Reconstruction on the Constitution (Alfred A. Knopf, 1973)

Neely, Jr., Mark E. The Fate of Liberty: Abraham Lincoln and Civil Liberties (Oxford University Press, 1991); won the 1992 Pulitzer Prize for History.

Neely, Jr., Mark E. Lincoln and the Triumph of the Nation: Constitutional Conflict in the American Civil War (University of North Carolina Press, 2011); covers the U.S. and the Confederate constitutions and their role in the conflict.