Hevardani, Kelly Angelly, Nurhizrah Gistituati, Alwen Bentri, Yerizon, and Yarman. “Mathematics Learning Based on Jean Piaget’s Cognitive Development Theory in Vocational Schools”. Rangkiang Mathematics Journal 5, no. 2 (October 29, 2026): 91–99. Accessed October 31, 2026. https://math.ppj.unp.ac.id/index.php/RMJ/article/view/62.