H.J. Heinz company foundation distinguished lecture University of Pittsburgh, Soldiers and Sailors Memorial Hall, 6 December 1991

South African History Online. (2012, June 27). H.J. Heinz company foundation distinguished lecture University of Pittsburgh, Soldiers and Sailors Memorial Hall, 6 December 1991. South African History Online. https://sahistory.org.za/nr/ref/R-0086601

South African History Online (2012) 'H.J. Heinz company foundation distinguished lecture University of Pittsburgh, Soldiers and Sailors Memorial Hall, 6 December 1991', South African History Online, 27 June. Available at: https://sahistory.org.za/nr/ref/R-0086601 (Accessed: 22 July 2026).

South African History Online, H.J. Heinz company foundation distinguished lecture University of Pittsburgh, Soldiers and Sailors Memorial Hall, 6 December 1991 [website], https://sahistory.org.za/nr/ref/R-0086601, (accessed 22 July 2026).

"H.J. Heinz company foundation distinguished lecture University of Pittsburgh, Soldiers and Sailors Memorial Hall, 6 December 1991." South African History Online, 27 June 2012, https://sahistory.org.za/nr/ref/R-0086601. Accessed 22 July 2026.

South African History Online. "H.J. Heinz company foundation distinguished lecture University of Pittsburgh, Soldiers and Sailors Memorial Hall, 6 December 1991." South African History Online. June 27, 2012. https://sahistory.org.za/nr/ref/R-0086601.