Simarmata, Natalia Lia, Kasih Kristina Waruwu, Putri Khairani, Fitria Ratnawati, and Jamaluddin Nasution. “Teaching Materials for Indonesian Language Skills for Foreign Speakers (BIPA)”. Vernacular: Linguistics, Literature, Communication and Culture Journal 3, no. 2 (February 29, 2024): 192–198. Accessed September 16, 2025. https://jurnal.harapan.ac.id/index.php/Vernacular/article/view/755.