Zebua, E., and Y. Zega. “The Effect of Course Review Horay Type Cooperative Learning Model on Mathematics Problem Solving Ability of Class X Students of SMK NEGERI 3 GUNUNGSITOLI”. Edumaspul: Jurnal Pendidikan, Vol. 7, no. 2, Oct. 2023, pp. 3974-81, https://ummaspul.e-journal.id/maspuljr/article/view/7083.