Source and copyright
Source: KENNEDY, John Fitzgerald. Radio and Television Report to the American People on the Soviet Arms Buildup in Cuba. In: John F. Kennedy: Containing the public messages, speeches and statements of the president : January 20 to December 31, 1961. U.S. Government Printing Office (U.S.G.P.O.). 22-10-1962. pp.806-809. (Public Papers of the Presidents of the United States).
Copyright: United States of America Government Printing Office