Indriyanti, I., and K. A. Hakam. “NHT Type Cooperative Learning Model (Numbered Heads Together) On Student Learning Results in Indonesian Language Learning in The Third Grade of SDN 1 Kawalimukti”. International Conference on Elementary Education, Vol. 3, no. 1, Apr. 2021, pp. 450-9, https://proceedings.upi.edu/index.php/icee/article/view/1499.