Eric Frederick Goldman: The tragedy of Lyndon Johnson. Macdonald, London 1969. Quoted from Scott Busby: Preface. In: Horace Busby: The thirty-first of March. An intimate portrait of Lyndon Johnson's final days in office. Farrar, Straus and Giroux, New York 2005, p. viii (online), ISBN978-0-374-27574-7.
Horace Busby: The thirty-first of March. An intimate portrait of Lyndon Johnson's final days in office. Farrar, Straus and Giroux, New York 2005,without page reference (after p. 250, online), ISBN978-0-374-27574-7.
Hugh Sidey: Introduction. In: Horace Busby: The thirty-first of March. An intimate portrait of Lyndon Johnson's final days in office. Farrar, Straus and Giroux, New York 2005, p. xvi (online) ISBN978-0-374-27574-7.
David M. Shribman (2013-05-24). "LBJ's Gettysburg Address". New York Times. Archived from the original on 2021-07-09. Retrieved 2021-07-01. Reprinted at lbjlibrary.org.
David M. Shribman (2013-05-24). "LBJ's Gettysburg Address". New York Times. Archived from the original on 2021-07-09. Retrieved 2021-07-01. Reprinted at lbjlibrary.org.