7Barnes, Helen, Michael Noble, Chris Dibben, Charles Meth, Gemma Wright, and Lucie Cluver. "South Africa microdata scoping study."Centre for the Analysis of South African Social Policy, University of Oxford, Working Paper no. 6 , no. 6 (2007).
37Van der Berg, Servaas, Cobus Burger, Ronelle Burger, Mia Vos, Gideon Rand, Martin Gustafsson, Eldridge Moses, Debra Shepherd, Nicholas Spaull, and Stephen Taylor. "Low quality education as a poverty trap."(2011)