Subakti, Jani, Agung Wibowo, and M. Zakie Hanifan. “Application of Problem-Based Learning in Business Mathematics”. inovator 14, no. 2 (August 25, 2025): 28–31. Accessed December 13, 2025. http://150.107.142.43/index.php/INOVATOR/article/view/21348.