Ting, Hie Ling, and S. Sunarti. “汉语作为第二语言习得语音格局研究综述: Review Study on Sound Pattern in Mandarin As Second Language Learning”. ERUDITE: Journal of Chinese Studies and Education, vol. 3, no. 2, Dec. 2022, pp. 24-36, https://doi.org/10.37134/erudite.vol3.2.2.2022.