Humphrey,Nicholas. Soul dust: The magic of consciousness. Quercus.
Cita Chicago (17th ed.)Humphrey,Nicholas. Soul Dust: The Magic of Consciousness. Quercus.
Cita MLA (8th ed.)Humphrey,Nicholas. Soul Dust: The Magic of Consciousness. Quercus.
Atenció: Aquestes cites poden no estar 100% correctes.