Saleh, H., M. Hussin, N. A. Rafie, and T. S. A. Tuan Yunazri. “Development of Ez-Maher Apps For Learning Listening And Speaking Skills”. Al-Ḍād Journal, vol. 4, no. 1, Oct. 2020, pp. 109-21, https://ejournal.um.edu.my/index.php/aldaad/article/view/26843.