Muljono, _, Sumpeno, S., Arifianto, D., Aikawa, K., & Purnomo, M. H. (2016). Developing an Online Self-learning System of Indonesian Pronunciation for Foreign Learners. International Journal of Emerging Technologies in Learning (iJET), 11(04), pp. 83–89. https://doi.org/10.3991/ijet.v11i04.5440