Hoe, T. W., L. C. Ying, and W. Yanzhen. “Mandarin Communication Learning App: A Proof-of-Concept Prototype of Contextual Learning”. Journal of Research, Policy & Practice of Teachers and Teacher Education, vol. 3, no. 2, Sept. 2018, pp. 38-48, https://ejournal.upsi.edu.my/index.php/JRPPTTE/article/view/172.