(en) John Cleman, Edgar Allan Poe, New York, Chelsea House Publishers, (ISBN0-7910-6173-6, OCLC48176842, lire en ligne), « Irresistible Impulses: Edgar Allan Poe and the Insanity Defense », p. 73.
(en) Pierre Celestin Cambiaire, The Influence of Edgar Allan Poe in France, Ardent Media, , 332 p. (lire en ligne), p. 40.
Dawn B. Sova, Edgar Allan Poe, A to Z : the essential reference to his life and work, New York, Facts on File, (ISBN0-8160-4161-X, OCLC44885229), p. 28.
(en) John Cleman, Edgar Allan Poe, New York, Chelsea House Publishers, (ISBN0-7910-6173-6, OCLC48176842, lire en ligne), « Irresistible Impulses: Edgar Allan Poe and the Insanity Defense », p. 73.