Readings:
- Abimbola, W. (1984). “The Notion of Sacrifice in Yoruba Religion”. In, D.W. Fern, (ed.). Restoring the Kingdom. New York: Paragon.
- Buckley, A. (1985). Yoruba Medicine. New York: Oxford University Press. (pp.12-24.)
- Gbadegesin, S. (1991). African Philosophy: Traditional Yoruba Philosophy and Contemporary African Realities. New York: Peter Lang. (pp.105-136.)
- Hallen, B. & J. Sodipo. (1997) Knowledge, Belief and Witchcraft: Analytic Experiments in African Philosophy. Stanford: Stanford University Press. (Chapter 3)
- Sofowora, A. (1993). Medical Plants and Traditional Medicine in Africa. Spectrum Books: Ibadan. (Chapters 1 & 2.)