Letchmanan, K., A. C. Ahmad, and S. Omar. “Using of Tactile Method in Helping Remedial Students in a Tamil School to Differentiate Small Letters “b” and ‘d’: A Case Study”. International Journal of Management and Development Studies, vol. 7, no. 2, Feb. 2018, pp. 40-43, https://old.ijmds.in/index.php/ijmds/article/view/931.