Saeed, G.- e-N., S. Ahsin, K. Saad, and A. Afzal. “COMPARISON OF ACADEMIC PERFORMANCE IN PEER ASSISTED AND EXPERT-ASSISTED LEARNING THROUGH TEST SCORES”. Pakistan Journal of Physiology, Vol. 14, no. 4, Dec. 2018, pp. 47-50, http://www.pjp.pps.org.pk/index.php/PJP/article/view/1029.