van der Walt, Lucien (2004). "Bakunin's heirs in South Africa: race and revolutionary syndicalism from the IWW to the International Socialist League, 1910–21". Politikon. 31 (1). Carfax Publishing: 67–89. doi:10.1080/02589340410001690819.
icftu.org
"South Africa". Annual Survey of Violations of Trade Union Rights (2006). Retrieved 12 July 2006.