Naomi E. Maurer, Vincent van Gogh, Paul Gauguin (1998). “The Pursuit of Spiritual Wisdom: The Thought and Art of Vincent Van Gogh and Paul Gauguin”, p.15, Fairleigh Dickinson Univ Press
Jeff Shaara, Michael Shaara (2012). “The Civil War Trilogy 3-Book Boxset (Gods and Generals, The Killer Angels, and The Last Full Measure)”, p.437, Ballantine Books