Jelaskan Catatan dari John F. Hartranft

Sauers, Richard A., "John Frederick Hartranft", Encyclopedia of the American Civil War: A Political, Social, and Military History, Heidler, David S., and Heidler, Jeanne T., eds., W. W. Norton & Company, 2000, .

Sommers, Richard J., Richmond Redeemed : the Siege at Petersburg, Garden City, N.Y. : Doubleday, 1981.

Steers Jr., Edward, and Holzer, Harold, eds., The Lincoln Assassination Conspirators: Their Confinement and Execution, as Recorded in the Letterbook of John Frederick Hartranft, Louisiana State University Press, 2009,

Warner, Ezra J., Generals in Blue: Lives of the Union Commanders, Louisiana State University Press, 1964, .