Manik CG, Herman H, Hutauruk BS. AN INVESTIGATION ON STUDENTS’ PERCEPTION TO THE USE OF CODE-SWITCHING IN ENGLISH AS A FOREIGN LANGUAGE (EFL) CLASSROOMS. EDU ISLAMIC [Internet]. 2025Oct.10 [cited 2026May1];5(3):512-20. Available from: http://jipkis.stai-dq.org/index.php/home/article/view/177