WARDANI, K. D.; PRAHMANA, R. C. I. Learning Direct and Inverse Proportion Using Pen and Money for Slow-Leaners. Indonesian Research Journal in Education |IRJE|, [S. l.], v. 5, n. 1, p. 63-84, 2021. DOI: 10.22437/irje.v5i1.10302. Disponível em: https://online-journal.unja.ac.id/irje/article/view/10302. Acesso em: 23 jul. 2024.