James D’Angelo PhD., 2012. Seed Sounds for Tuning the Chakras: Vowels, Consonants, and Syllables for Spiritual Transformation. Pap/Com Edition. Destiny Books.
Mehtab Benton, 2013. Gong Yoga. Revised 2013 Edition. Bookshelf Press.
Joachim-Ernst Berendt, 1991. The World Is Sound: Nada Brahma: Music and the Landscape of Consciousness. New Edition of Nada Brahma: The World Is Sound: Music and the Landscape of Consciousness Edition. Destiny Books.
Hazrat Inayat Khan, 1996. The Mysticism of Sound and Music (Shambhala Dragon Editions). Revised Edition. Shambhala.
George Leonard, 1977. The Silent Pulse: A Search for the Perfect Rhythm that Exists in Each of Us. Revise & Updated Edition. Gibbs Smith.
Russill Paul, 2006. The Yoga of Sound: Tapping the Hidden Power of Music and Chant. 2nd Edition. New World Library.
Frank Perry, 2014. Himalayan Sound Revelations: The Complete Tibetan Singing Bowl Book. 1st Edition. Polair Publishing.
Dane Rudhyar, 1982. The Magic of Tone and the Art of Music. 1st Edition. Shambhala.