1. Afrocentrism;Alcoba,2008
2. Alexander, G. (2004). The design and evaluation of a staff development programme for amalgamated schools in the Northern Cape. Ph.D. Thesis (Unpublished), Bloemfontein: University of the Free State.
3. Learning and teaching: Piaget's development theory;Antherton,2005
4. Apprenticeship Act of 1922. Amended 1944. Unity on the right. http://www.legalb.co.za/SA/SA-Nat-List-Date-1922-TAGGED.htm (visited June 4, 2009).
5. Great Zimbabwe: an ancient African city-state;Asante,1994