Paula Modersohn-Becker, Günter Busch, Liselotte von Reinken, Arthur S. Wensinger, Carole Clew Hoey (1998). “Paula Modersohn-Becker, the Letters and Journals”, p.80, Northwestern University Press
Jane Roberts (2011). “The Nature of Personal Reality (A Seth Book): Specific, Practical Techniques for Solving Everyday Problems and Enriching the Life You Know”, p.359, Amber-Allen Publishing