1969
Turner, V. (1969). Liminality and communitas. In: The ritual process: Structure and anti-structure (pp. 94-130). Ithaca, NY: Cornell Paperbacks.
2003
Douglas, M. (2003). Secular Defilement. In: Purity and danger: An analysis of concepts of pollution and taboo (pp. 30-41). London: Routledge.