Ike's Bluff: President Eisenhower's Secret Battle to Save the World. Little, Brown. p. 175. ISBN 978-0316217279. Retrieved April 28, 2017.

^ Newton, Eisenhower pp. 196–199.

^ Clarence G. Lasby, Eisenhower's Heart Attack: How Ike Beat Heart Disease and Held on to the Presidency (1997) pp. 57–113.

^ Robert P. Hudson, "Eisenhower's Heart Attack: How Ike Beat Heart Disease and Held on to the Presidency (review)" Bulletin of the History of Medicine 72#1 (1998) pp. 161–162 online Archived April 29, 2017, at the Wayback Machine.

^ R.H. Ferrell, Ill-Advised: Presidential Health & Public Trust (1992), pp. 53–150

^ Ambrose 1984, p. 272

^ Ambrose 1984, p. 281

^ Johnston, Richard J. H. (June 13, 1956). "Butler Criticizes Illness Reports: Says News Has Been Handled in Terms of Propaganda—Hagerty Denies It". The New York Times. p. 32A. Retrieved December 22, 2016. Paul M. Butler, the Democratic National Chairman, ... declared that the physicians who operated on and attended the President in his most recent illness 'have done a terrific job of trying to convince the American people that a man who has had a heart attack and then was afflicted with Crohn's disease is a better man physically.'