WARDANI, Kartika Dyah; PRAHMANA, Rully Charitas Indra. 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://www.online-journal.unja.ac.id/irje/article/view/10302. Acesso em: 17 apr. 2026.