Khalida R. DESCRIPTION OF THE EFFORTS OF PARENTS WITH DOWN SYNDROME CHILDREN ON DEVELOPMENT OF FIRST LANGUAGE ACQUISITION: -. JURNAL KESEHATAN MERCUSUAR [Internet]. 30 Desember 2019 [dikutip 12 Oktober 2025];2(2). Tersedia pada: https://jurnal2.mercubaktijaya.ac.id/index.php/mercusuar/article/view/49