Dr. Usha Devi N. “PROBLEM BASED LEARNING (PBL): IS IT A WINNING FORMULA FOR SUPERIOR PERFORMANCE?”. International Journal of Applied Service Marketing Perspectives 7, no. 04 (December 31, 2018): 3486-3494. Accessed April 27, 2025. https://asmp.gfer.org/index.php/asmp/article/view/17.