"Background Documents". Ripple of Hope in the Land of Apartheid: Robert F. Kennedy in South Africa, June 4th – 9th, 1966. Archived from the original on 10 September 2005. Retrieved 14 April 2020.
"Charles Nupen". www.sahistory.org.za. Retrieved 10 May 2024.
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"Background Documents". Ripple of Hope in the Land of Apartheid: Robert F. Kennedy in South Africa, June 4th – 9th, 1966. Archived from the original on 10 September 2005. Retrieved 14 April 2020.