Navidinia, H., M. Khoshhal, and M. Mobaraki. “Exploring the Effectiveness of Using L1 in Teaching Grammar to English As a Foreign Language Learner”. AJELP: Asian Journal of English Language and Pedagogy, vol. 8, no. 1, May 2020, pp. 31-40, https://ejournal.upsi.edu.my/index.php/AJELP/article/view/3349.