Paul Gifford, The Christian Churches and the Democratisation of Africa, BRILL, 1995, ISBN90-04-10324-4, p. 103.
Rhodian G. Munyenyembe, Christianity and Socio-cultural Issues: The Charismatic Movement and Contextualization of the Gospel in Malawi, African Books Collective, 2011, ISBN99908-87-52-7, p. 6.