Eka Margareta Sinaga, Nova Florentina Ambarwati, & Ahmad Sudito Sihotang. (2026). Ruma Bolon-based IPAS instruction for strengthening elementary students’ critical thinking skills. Primary: Jurnal Pendidikan Guru Sekolah Dasar, 15(3), 786-796. https://doi.org/10.33578/jpfkip.v15i3.786-796