Switzerland
Jung, Carl. Letter to an unnamed clergyman. 1952.
Jung, Carl. Gegenwart und Zukunft [The Undiscovered Self], translated by R. F. C. Hull. Routledge & Kegen Paul, 1958.
Ritz, Cesar. Quoted in Piccadilly to Pall Mall: Manners, Morals and Man, by Ralph Nevill and Charles Edward Jerningham. Duckworth & Co, 1908.
Hesse, Herman. Der Steppenwolf [The Steppenwolf]. S. Fischer Verlag, 1927.
Hesse, Herman. Steppenwolf, translated by Basil Creighton. Picador, 2002.
Klee, Paul. The Diaries of Paul Klee, 1898-1918, edited by Felix Klee. University of California Press, 1968. Originally a diary entry, 8 Oct. 1917.
Hesse, Herman. Die Geschichte von Emil Sinclairs Jugend [Demian: The Story of Emil Sinclair's Youth]. Fischer Verlag, 1919.
Hesse, Herman. Demian, translated by Damion Searls. Penguin Classics, 2013.
Jung, Carl. Psychologische Typen [Psychological Types]. Rascher Verlag, 1921.
Jung, Carl. Psychological Types, edited by R. F. C. Hull, translated by H. G. Baynes. Princeton University Press, 1976.
Jung, Carl. The Integration of Personality, translated by Stanley Dell. Farrar & Rinehart, 1939.
Hesse, Herman. Die Geschichte von Emil Sinclairs Jugend [Demian: The Story of Emil Sinclair's Youth]. Fischer Verlag, 1919.
Hesse, Herman. Demian, translated by Damion Searls. Penguin Classics, 2013.
Hesse, Herman. Narziß und Goldmund [Narcissus and Goldmund]. Fischer Verlag, 1930.
Hesse, Herman. Narcissus and Goldmund, translated by Ursule Molinaro. Bantam, 1984.
Jung, Carl. "Aims of Psychotherapy." Modern Man in Search of a Soul, translated by Cary F. Baynes and William Stanley Dell. Kegen Paul, Trenche, Trubner & Co., 1933.
Klee, Paul. Quoted in Klee, written by Susanna Partsch. Taschen, 2015. Originally a diary entry, 16 Apr. 1914.