Bitter, Gary Glen. “The Effect of an M-Learning English Speaking Software App on Students in the Chiang Rai Municipality Schools 6 and 7 in Thailand”. International Journal for Innovation Education and Research 4, no. 12 (December 1, 2016): 154–172. Accessed July 3, 2024. https://scholarsjournal.net/index.php/ijier/article/view/71.