Hepnyi Samosir. “LANGUAGE ACQUISITION IN BAHASA INDONESIA: A CASE STUDY ON 4.2 AND 1.8-YEAR-OLD CHILDREN”. Akrab Juara : Jurnal Ilmu-Ilmu Sosial, vol. 9, no. 2, May 2025, pp. 608-15, https://akrabjuara.com/index.php/akrabjuara/article/view/2411.