ARIFAH; NURHABIBI; SOFIA, Nida Aya. Improving Concept Understanding with Problem-Based Learning: Action Research at State Elementary School 106218 Pematang Toba. Journal of Indonesian Primary School, [S. l.], v. 1, n. 4, p. 33–42, 2024. Disponível em: https://journal.mgedukasia.or.id/index.php/jips/article/view/222. Acesso em: 9 mar. 2025.