MARTA, Rusdial. Penanganan Kognitif Down Syndrome melalui Metode Puzzle pada Anak Usia Dini. Jurnal Obsesi : Jurnal Pendidikan Anak Usia Dini, [S. l.], v. 1, n. 1, p. 32–41, 2017. DOI: 10.31004/obsesi.v1i1.29. Disponível em: https://mail.obsesi.or.id/index.php/obsesi/article/view/29. Acesso em: 27 sep. 2026.