Hawkins, D. R. (2005). Transcending the levels of consciousness: The stairway to enlightenment. Hay House, Inc..
Chicago-viite (17. p.)Hawkins, David R. Transcending the Levels of Consciousness: The Stairway to Enlightenment. Carlsbad, California: Hay House, Inc., 2005.
MLA-viite (9. p.)Hawkins, David R. Transcending the Levels of Consciousness: The Stairway to Enlightenment. Hay House, Inc., 2005.
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