Intopiana, Angelina, Renata Nikijuluw, and Monica Monica. 2021. “INVESTIGATING STUDENTS’ PERCEPTION OF SPEAKING ACTIVITIES IN THE XI GRADE OF SMA NEGERI 19 MBD”. Koli Journal : English Language Education 2 (2), 1-11. https://ojs3.unpatti.ac.id/index.php/koli/article/view/7625.