Simanjuntak, Nova Marya. “Code Switching and Code Mixing in the Teaching Process: A Case Study at Rainbow School of Joy in Medan”. CSR International Journal 2, no. 1 (December 15, 2022): 63–69. Accessed October 10, 2026. https://ejournal.altsacentre.org/index.php/csrij/article/view/37.