Oktavianti, Ikmi Nur, Enggar Bagas Dewantara, Noor Raha Mohd Radzuan, and Wan Jumani Binti Fauzi. “Exploring Politeness Through Modality: A Corpus-Based Analysis of Modal Verbs in Indonesian EFL Textbooks”. JOLLT Journal of Languages and Language Teaching 14, no. 2 (April 17, 2026): 779–790. Accessed April 20, 2026. https://ojspanel.undikma.ac.id/index.php/jollt/article/view/18131.