François Arago (1859). “Biographies of Distinguished Scientific Men: The history of my youth, an autobiography of Francis Arago.Bailly.Herschel.Laplace.Joseph Fourier.-ser. 2 Carnot.Malus.Fresnel.Thomas Young.James Watt”, p.412
Briefing by National Security Advisor Tom Donilon and Deputy National Security Advisor Ben Rhodes on Libya and the Middle East, obamawhitehouse.archives.gov. March 10, 2011.
William Warburton, Richard Hurd (1811). “The Works: To which is Prefixed a Discourse by Way of General Preface, Containing Some Account of the Life, Writings, and Character of the Author”, p.62