VALIDITY OF SUPPLEMENTARY TEACHING MATERIALS ON BUFFER SOLUTION TO TRAIN ARGUMENTATION . SPEKTRA: Jurnal Kajian Pendidikan Sains, [S. l.], v. 10, n. 1, p. 67–85, 2024. DOI: 10.32699/23e0t159. Disponível em: https://ojs.unsiq.ac.id/index.php/spektra/article/view/11121. Acesso em: 28 may. 2026.