1. Interview with Abel Esterhuyse , 3 August 2011 .
2. Allison, Graham and Philip, Zelikow. 1999.Essence of decision: explaining the Cuban missile crisis, 255New York: Longman.
3. Allison, Graham and Philip, Zelikow. 1999.Essence of decision: explaining the Cuban missile crisis, 255New York: Longman.
4. Grundy, Kenneth. 1986.The militarization of South African politics, 8Bloomington: Indiana University Press.
5. Pienaar, Sara. 1987.South Africa and international relations between the two world wars: the League of Nations dimension, 149Johannesburg: Witwatersrand University Press.