Psychological literature
Bettelheim, Bruno. A Good Enough Parent: A Book on Child-Rearing. Alfred A. Knopf, 1987, ch. 9.
James, William. "The Reality of the Unseen." Gifford Lecture. c. 1902, University of Edinburgh, Edinburgh, Scotland. Lecture.
James, William. "The Reality of the Unseen." The Varieties of Religious Experience, edited by Martin E. Marty. Penguin Classics, 1982.
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.
Adler, Alfred. Problems of Nerosis. Cosmopolitan Book Corporation, 1930.