2. Becker R, Selden G. The Physique Electrical: Electromagnetism and the Basis of Life. William Morrow Paperbacks; 1998.
3. Myss C. Anatomy of The Spirit: The Seven Levels of Energy and Therapeutic. Concord; 1996.
4. Lipton B. The Biology of Perception: Unleashing the Energy of Consciousness, Matter & Miracles. Hay Home Inc; 2016.