Vincent van Gogh, Vincent Willem Gogh (1927). “The Letters of Vincent Van Gogh to His Brother, 1872-1886: With a Memoir by His Sister-in-law, J. Van Gogh-Bonger ...”
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.58, Fairleigh Dickinson Univ Press
Vincent van Gogh, Vincent Willem Gogh (1927). “The Letters of Vincent Van Gogh to His Brother, 1872-1886: With a Memoir by His Sister-in-law, J. Van Gogh-Bonger ...”
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.88, Fairleigh Dickinson Univ Press
Leo Jansen, Vincent van Gogh, Émile Bernard, Hans Luijten, Nienke Bakker (2007). “Vincent Van Gogh: painted with words : the letters to Émile Bernard”, Rizzoli
Vincent van Gogh, Anthon Gerhard Alexander Rappard (ridder van), Anthon van Rappard (1936). “Letters to an artist: from Vincent van Gogh to Anton ridder van Rappard, 1881-1885”