"John F. Kennedy: 1961 : containing the public messages, speeches, and statements of the president, January 20 to December 31, 1961" by John F. Kennedy, Washington: Office of the Federal Register, National Archives and Records Service, General Services Administration, 1962.
Joseph Addison, Richard Steele, Francis Prévost, Francis William Blagdon (1833). “The Spectator, in Miniature: Being the Principal Religious, Moral, Humourous, Satirical and Critical Essays, in that Publication Compressed Into Two Volumes”, p.212