van der Veer, Peter Religious Diversity, MPI for the Study of Religious and Ethnic Diversity, Max Planck Society;
http://www.bloomsbury.com/uk/key-terms-in-material-religion-9781472595454/ (Verlagsversion)
van der Veer, P. (2015). Spirit. In B. Plate (Ed.), Key terms in material religion (pp. 231-236). London: Bloomsbury.