Ansa, Aira, Rodel Camposo, Christian Plariza, and Tessie Miralles. 2017. “Code-Switching in Instruction Among Language Teachers and Students and Communicative Competence of Second-Year Students of UMDC”. UM Digos Research Journal 9 (1): 238-44. https://ieesjournals.com/index.php/umdrj/article/view/62.