Devi Alvionita Alindra et al. 2025. Speech Acts Across Cultures: A Comparative Study of Request, Refusal, and Apology in English and Mandarin. International Journal of English and Applied Linguistics (IJEAL). 5, 3 (Dec. 2025), 476–489. DOI:https://doi.org/10.47709/ijeal.v5i3.7380.