am prepared to die" . The Guardian . London . http://www.guardian.co.uk/world/2007/apr/23/nelsonmandela . Retrieved 28 October 2008 .   ^ a b "The Sharpeville Massacre" . TIME . 4 April 1960 . http://www.time.com/time/magazine/article/0,9171,869441-1,00.html . Retrieved 28 October 2008 .   ^ "Manifesto of Umkhonto we Sizwe" . African National Congress. 16 December