Rangkuti, A., and I. R. Karo-Karo. “The Effect of the Group Investigation Model Assisted by the ‘Make a Match’ Game on Mathematical Problem-Solving Ability in Statistics”. Journal of Mathematics Instruction, Social Research and Opinion, vol. 5, no. 3, Aug. 2026, pp. 2405–2414, doi:10.58421/misro.v5i3.1995.