Ngo, Thi Hien Trang, and Quy Khuong Luu. “Direct Direct Apology Strategies and Their Lexicogrammatical Realizations in English Conversations: Implications for EFL Students”. International Journal of TESOL & Education 2, no. 2 (April 19, 2022): 82–94. Accessed June 7, 2025. https://i-jte.phamho.com/index.php/journal/article/view/217.