Hutapea, P. “The Effect Of Group Investigation (GI) Learning Model Based On La-Boratory Experiment Skills On Newton’s La Material In Grade X Of Senior High School Negeri 2 Percut Sei Tuan Academic Year 2024/2025: Jurnal Pendidikan”. Jurnal Ilmu Pendidikan Dan Humaniora, vol. 14, no. 3, Sept. 2025, pp. 205-19, doi:10.35335/jiph.v14i3.214.