1. Beck G (2012) Sonic liturgy: ritual and music in Hindu tradition. University of South Carolina, Columbia
2. Beck G (1993) Sonic theology: Hinduism and sacred sound. University of South Carolina, Columbia
3. Bharati A (1970) The tantric tradition. Doubleday Anchor, New York
4. Coward H (1988) Sacred word and sacred text: scripture in world religions. Orbis, Maryknoll
5. Graham W (1987) Beyond the written word: oral aspects of scripture in the history of religion. Cambridge University Press, Cambridge