Ong, E. S., W. T. Koh, and A. Teo. “CODE-SWITCHING IN SINGAPOREAN ESL CLASSROOMS: HOW IT AFFECTS CLASSROOM DISCOURSE AND STUDENT UNDERSTANDING”. African Journal of Emerging Issues, Vol. 5, no. 13, Sept. 2023, pp. 10 -24, https://ajoeijournals.org/sys/index.php/ajoei/article/view/472.