1. Robin L. Cautin (2011), ‘A Century of Psychotherapy, 1860–1960’, in History of Psychotherapy: Continuity and Change, ed. by John C. Norcross, Gary R. Vandenbos and Donald K. Freedheim, Washington: American Psychological Association, pp. 3–38.
2. For a useful introduction to the major psychotherapies practised today, see Joel Kovel (1991), A Complete Guide to Psychotherapy: From Psychoanalysis to Behaviour Modification, London: Penguin Books; and History of Psychotherapy: Continuity and Change, ed. by John C. Norcross, Gary R. Vandenbos and Donald K. Freedheim, Washington: American Psychological Association.
3. Ralph Waldo Emerson (1993 [1841]), ‘The Over-soul’, in Ralph Waldo Emerson, Self-Reliance and Other Essays, ed. by Stanley Applebaum, New York: Dover Publications, Inc.
4. Ralph Waldo Emerson (1993 [1838]), ‘The Divinity School Address’, in Ralph Waldo Emerson, Self-Reliance and Other Essays, ed. Stanley Applebaum, New York: Dover Publications, Inc.
5. Warren Felt Evans (1869), The Mental Cure, Illustrating the Influence of the Mind on the Body, both in Health and Disease, and the Psychological Method of Treatment, Boston: H. H. & T. W. Carter;