Goodman, David (2002). Fault lines: journeys into the new South Africa. Weinberg, Paul. Berkeley: University of California Press. p. 143. ISBN978-0-520-23203-7. OCLC49834339.
Leeson, Robert (2015). Hayek: A Collaborative Biography: Part II, Austria, America and the Rise of Hitler, 1899–1933. London: Palgrave Macmillan. p. 101. ISBN978-1-137-32508-2. OCLC3902668325.
Dousemetzis, Harris (2018). The man who killed apartheid: the life of Dimitri Tsafendas. Johannesburg, South Africa: Jacana Media. ISBN978-1-4314-2754-3. OCLC1049908753.