Ni Made Wiyasmei Gyanthi, I Gusti Ayu Tri Agustiana, dan Dewe Gede Firstia. “LAPS-HEURISTIC Learning Model Improves Mathematical Problem-Solving Ability”. International Journal of Elementary Education, vol. 7, no. 1, Februari 2023, hlm. 169-77, doi:10.23887/ijee.v7i1.58407.