Nainggolan, Maria, & Mei Lyna Girsang.
" THE ANALYSIS OF LANGUAGE MAINTENANCE OF BATAK TOBA AND KARO LANGUAGE." <em>ANGLO-SAXON: Jurnal Ilmiah Program Studi Pendidikan Bahasa Inggris</em> [Online], 10.2 (2019): 95-104. Web. 12 Feb. 2026