(页面存档备份,存于互联网档案馆) op South African History Online President Jacob Verwoerd's lame excuses for textbook scandal (页面存档备份,存于互联网档案馆) in BusinessDay, 25 Julie 2012
Neoconservatism and the Institute for the Study of War. 商業日報 (南非)(英语:BusinessDay (SouthAfrica)). 2012-10-27. [失效連結] Institute for the Study of War. [2022-04-02]