Sirampun E, Kho R, Lumbantobing H, Napitupulu B, Hadiyanti YR, Tandililing P, et al. PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE NUMBER HEAD TOGETHER DI SMP NEGERI I SARMI. Sci. tech. jpm. [Internet]. 2024 May 20 [cited 2024 Nov. 21];1(2):131-40. Available from: https://journal.scitechgrup.com/index.php/sjpm/article/view/42