NASUTION, Irma Yani Lidia; MULYONO, Mulyono; SURYA, Edy. Development of Mathematics Learning Tools Using Problem Based Learning Model to Improve Problem Solving Skills and Learning Motivation. Jurnal Perspektif, [S. l.], v. 8, n. 2, p. 250–262, 2024. DOI: 10.15575/jp.v8i2.306. Disponível em: http://perspektif.uinsgd.ac.id/index.php/JP/article/view/306. Acesso em: 20 jun. 2025.