Journey in Depth. A Transpersonal Perspective
Barbara Somers, Ian Gordon-Brown & Ed. Hazel Marshall.

• Hardcover: 304 pages
• Publisher: Archive Publishing (27 Jun 2002)
• ISBN: 0954271203

Transpersonal Psychotherapy: Theory & Practice
Edited by Nigel Wellings, Elizabeth Wilde & McCormick.

• Paperback: 240 pages
• Publisher: SAGE Publications Ltd (6 Jul 2000)
• ISBN: 0826448461

The Inward Arc. Healing in Psychotherapy and Spirituality
by Frances Vaughan.

• Paperback: 256 pages
• Publisher: iUniverse.com (1 Dec 2000)
• ISBN: 059515199X