Muriel Horrell, South African Institute of Race Relations: A survey of race relations in South Africa 1971. Johannesburg, S. 54 (Vorschau in der Google-Buchsuche)
Richard Elphick, Rodney Davenport (ed.s): Christianity in South Africa: a political, social, and cultural history. Berkley, Los Angeles, 1997, S. 362 ISBN 0-520-20939-7 (Vorschau in der Google-Buchsuche)