U. Kalsum, Fadilaturrahmah, and I. Yupiter, “The Use of Flashcards in Vocabulary Mastery of The Students With Down Syndrom at SLB Negeri Pagaralam”, JEIT, vol. 1, no. 2, pp. 34–43, Aug. 2025, doi: 10.63324/jeit.1.2.2025.68.