Hern, K. J., M. K. A. bin Mohd Yusof, F. N. binti Zaifulbahri, N. A. binti Azahar, G. Sugumaran, and N. K. Sarkunam. “Effect of Verbal & Pictorial Materials on Memory Retention Among Undergraduate Students - An Interventional Study”. New Insights into Disease and Pathogen Research Vol. 1, July 2019, pp. 43-54, https://stm1.bookpi.org/index.php/nidpr-v1/article/view/264.