Akmal, H., A. Syahriyani, and T. Handayani. “Request Speech Act of Indonesian English Learners and Australian English Speakers Through Cross-Cultural Pragmatic Perspectives”. LEARN Journal: Language Education and Acquisition Research Network, vol. 15, no. 2, July 2022, pp. 498-20, https://so04.tci-thaijo.org/index.php/LEARN/article/view/259938.