1. Different children different needs: the art of adjustable parenting;Boyd,1994
2. Briggs-Myers, I., & Briggs, K.C. (Accessed 1 April 2006).
3. Burger, A.J. (2003). Some psychological and biographical predictors of computer proficiency. An analysis of the potential of a novice to become a good computer user. Unpublished master’s dissertation, University of the Free State.
4. Please understand me: Character & temperament types;Keirsey,1984
5. Practical research planning and design;Leedy,2001