Ullman, M., & Wolman, B. B. (1986). Handbook of states of consciousness. Van Nostrand Reinhold.
Cita Chicago (17th ed.)Ullman, Montague, i Benjamin B. Wolman. Handbook of States of Consciousness. New York: Van Nostrand Reinhold, 1986.
Cita MLA (9th ed.)Ullman, Montague, i Benjamin B. Wolman. Handbook of States of Consciousness. Van Nostrand Reinhold, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.