Kartika, N. R., and K. s. “LANGUAGE ACQUISITION AND LANGUAGE DEVELOPMENT OF CHILDREN”. Ar-Rihlah: Jurnal Inovasi Pengembangan Pendidikan Islam, Vol. 4, no. 2, Sept. 2019, pp. 239-54, http://ejournal.iainu-kebumen.ac.id/index.php/Ar-rihlah/article/view/152.