
Letter to H. E. Kramer, 25-10-1926, as quoted in: Bram van Velde, A Tribute, Municipal Museum De Lakenhal Leiden, Municipal Museum Schiedam, Museum de Wieger, Deurne 1994, p. 44 (English translation: Charlotte Burgmans)
1920's
'Painting and Culture' p. 56
Search for the Real and Other Essays (1948)
Letter to H. E. Kramer, 25-10-1926, as quoted in: Bram van Velde, A Tribute, Municipal Museum De Lakenhal Leiden, Municipal Museum Schiedam, Museum de Wieger, Deurne 1994, p. 44 (English translation: Charlotte Burgmans)
1920's
Journal entry (1923), as quoted in The Ghost in the Little House, ch. 7, by William V. Holtz (1993).
Part IV, Chapter VI
Les voix du silence [Voices of Silence] (1951)
Part III, Chapter 10, AMPO Versus City, p. 142.
The Art and Science of Negotiation (1982)