WILLYARTO, M. N. Learning Polygons using English Language. Humaniora, [S. l.], v. 8, n. 4, p. 391-398, 2017. DOI: 10.21512/humaniora.v8i4.4102. Disponível em: https://journal.binus.ac.id/index.php/Humaniora/article/view/4102. Acesso em: 22 feb. 2025.