JANETRIA. Analysis of Ability to Recognize Letters B and D Ages 5 — 6 Years in Private Kindergarten St. Antonius 2 Medan. Indonesian Journal of Advanced Research, [S. l.], v. 3, n. 2, p. 261–274, 2024. DOI: 10.55927/ijar.v3i2.8169. Disponível em: https://journal.formosapublisher.org/index.php/ijar/article/view/8169. Acesso em: 24 apr. 2026.