Ndraha, Libertini Priskila, Nenni Triana Sinaga, and Carolina Pakpahan. “The Students’ Errors and Problems Encountered in Speaking Class at Harford Institute”. Jurnal Kajian Ilmu Pendidikan (JKIP) 6, no. 2 (June 9, 2025): 416-426. Accessed July 6, 2025. https://journal.al-matani.com/index.php/jkip/article/view/1344.