“Correlating the Developmental Test of Visula Perception -2 (DTVP and the Test of Visual Perceptual Skills - Revised (TVPS-R) As Assesssment Tools for Learners With Learning Difficulties”. South African Journal of Occupational Therapy, vol. 41, no. 1, Apr. 2011, pp. 33-37, https://journals.assaf.org.za/index.php/sajot/article/view/19750.