Anjani, Siti Dwita, and Farida Kurniawati. “Improvement on Distinguishing ‘B’ and ‘D’ Letter : Direct Instruction Flashcards Intervention for A Slow Learner”. Jurnal Paedagogy 12, no. 1 (January 21, 2025): 87–97. Accessed August 15, 2025. https://e-journal3.undikma.ac.id/index.php/pedagogy/article/view/13790.