Harianja, C. C. ., Simamora, B. A. ., & Gultom , B. T. . (2023). The Effect of the Numbered Heads Together (NHT) Cooperative Learning Model on Class VII Social Studies Learning Outcomes of SMP Negeri 5 Pematang Siantar T.A 2022/2023. Indonesian Journal of Advanced Research, 2(6), 665–676. https://doi.org/10.55927/ijar.v2i6.4713