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Marcelino Hermawan, Marcellino Aditya, and Winta T. Satwikasanti. “Perancangan APE Bagi Siswa Penyandang Tunagrahita Untuk Meningkatkan Kemampuan Berhitung Dasar, Dengan Pendekatan Pembelajaran Manipulatif”. SERENADE : Seminar on Research and Innovation of Art and Design, vol. 3, no. 1, Aug. 2025, https://serenade.ukdw.ac.id/index.php/serenade/article/view/226.