Source: Gandhi: Satyagraha in South Africa, Nayajivan, Ahmedabad, 1928, pp. 109-15., quoted in Gandhi explains Satyagraha, article on the South Africa Online History site [1], consulted 10 September 2014
One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1922). "Clifford, John". Encyclopædia Britannica. Vol. 30 (12th ed.). London & New York: The Encyclopædia Britannica Company. p. 703.