1. Ayrookuzhiel, A. M. Abraham (1983). The Sacred in Popular Hinduism: An Empirical Study in Chirakkal, North Malabar, The Christian Literature Society.
2. Babb, Lawrence A. (1975). The Divine Hierarchy: Popular Hinduism in Central India, Columbia University Press.
3. Keyes, Charles F., and Daniel, E. Valentine (1983). Karma: An Anthropological Inquiry, University of California Press.
4. Basham, Arthur Llewellyn (1989). The Origins and Development of Classical Hinduism, Beacon Press. Edited and Annotated by Kenneth G. Zysk.
5. The Cultural Department of the Embassy of the Federal Republic of Germany (1973). German Scholars on India: Contributions to Indian Studies, Chowkhamba Sanskrit Series Office.