“The Perceptions Of Youth Community On The Use Of Slang Language On The Maintenance Of Mother Tongue In Pematangsiantar”. Jurnal Kajian Ilmu Pendidikan (JKIP) 7, no. 3 (April 21, 2026): 1483–1492. Diakses Juli 30, 2026. https://journal.al-matani.com/index.php/jkip/article/view/2284.