J. T. K. Yap, S. S. Loh, and S. P. Wee, “Mastery of Mandarin Tone Sandhi by UiTM Introductory Mandarin Learners”, Intl. J. Adv. Res. Fut. Ready Learning Edu., vol. 29, no. 1, pp. 20–31, Jan. 2023.