Alipour, Mohammad, and Soroor Tajfar. “Investigating (Im)politeness in Online Forums Between English Speakers and English As a Foreign Language Learners”. Global Journal of Foreign Language Teaching 9, no. 3 (August 31, 2019): 137–156. Accessed May 8, 2024. https://un-pub.eu/ojs/index.php/GJFLT/article/view/4205.