1. Assessment concessions for learners with impairments;Alant;South African Journal of Education,2005
2. Bayley scales of infant and toddler development;Bayley,2006
3. Bayley scales of infant and toddler development (3rd ed.). Technical manual;Bayley,2006
4. Visual problems as a result of brain damage in children;Dutton;British Journal of Ophthalmology,2006
5. Research methods for the behavioral sciences;Gravetter,2012