Hanna, S., and M. Mahyuni. “An Analysis of Code Switching Used by English Teachers in Teaching and Learning Process (A Case Study At SMPN 14 Mataram)”. Jurnal Ilmiah Pendidikan Indonesia, vol. 1, no. 2, Dec. 2019, pp. 162-8, https://jipi.unram.ac.id/index.php/jipi/article/view/23.