Hidayat, Muhammad, and Paidi Paidi. “The Effectiveness of Cooperative Learning NHT Type and Concept Mapping on the Cooperation and the Concept Master”. Journal of Science Education Research 3, no. 1 (October 22, 2019): 20–29. Accessed May 15, 2025. https://jurnal.uny.ac.id/index.php/jser/article/view/27300.