- Livre audioGurdjieffClaudio Naranjo, M.D.
- Livre audioPowers Of PerceptionCharles Tart, Ph.D.
- Livre audioSpiritual Beings In A Material WorldCharles Tart, Ph.D.
- Livre audioDiving Into The Pool Of ConsciousnessArthur Hastings, Ph.D.
- Livre audioScientific Support for the Spiritual Dimension of LifeCharles Tart, Ph.D.