EKA MARGARETA SINAGA; NOVA FLORENTINA AMBARWATI; AHMAD SUDITO SIHOTANG. Ruma Bolon-based IPAS instruction for strengthening elementary students’ critical thinking skills. Primary: Jurnal Pendidikan Guru Sekolah Dasar, [S. l.], v. 15, n. 3, p. 786–796, 2026. DOI: 10.33578/jpfkip.v15i3.786-796. Disponível em: https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/1491. Acesso em: 16 sep. 2026.